key oxford discover grammar 3

Student Book 3 Answer Key
Unit 1
Page 4
B
Health and Sports Day is an
interesting traditional event in
Japan. I’m interested in finding out
about it. Aiko, can you tell me about
this special day?
Of course, Dan. In my village, we
always have lots of exciting races and
games. My race was very tiring!
Did you win?
No, I didn’t. I was disappointed. I was
surprised, too, because I’m a very
good, fast runner. But there are lots
of amazing athletes here today!
There’s a band here today, too. Their
music is very entertaining.
That’s right! It’s relaxing to sit in the
sun and listen to music. There’s some
great traditional dancing later, too.
I’m very excited about that!
-ing ending: interesting, exciting,
tiring, amazing, entertaining,
relaxing
-ed ending: interested, disappointed,
surprised, excited
other: traditional (x 2), special, good,
fast

Page 5
B
1 Sports Day is a traditional event.
2 It’s a very exciting day.
3 The children are very happy.
4 The races are tiring.
5 I’m a good athlete.
6 The winners get small prizes.

F
Health and Sports Day was very
exciting. Are there traditional sports
events in your country, too?
Yes, there are. We celebrate Youth
and Sports Day every year. I’m always
very excited when that day arrives!
That’s interesting. What happens on
Youth and Sports Day?
It’s an amazing day. We sing
traditional songs and do lots of
exciting sports. There are lots of
entertaining activities like folk
dances and plays, too.
Are you interested in folk dancing?
Yes, I am. Are you surprised?
Yes! I didn’t know that about you

Page 7
H
1 ing

2 ing
3 ing
4 ed
5 ing
6 ing
7 ed
8 ed
I
2 exciting races.
3 Because he’s a fast runner.
4 He’s always very tired.
5 They think it’s boring.
6 He thinks it’s great.
7 He’s never bored, and he is always
very excited.
J
Students’ own answers

Page 6
D
1 interesting
2 exciting
3 tired
4 disappointed
5 entertaining
6 relaxing
E
1 exciting
2 excited
3 interesting

4 amazing
5 exciting
6 entertaining
7 interested
8 surprised
Oxford Discover Grammar  Student Book 3 Answer Key  © Oxford University Press

Unit 2
Page 8
B
Children all over the world enjoy
playing games together. A popular
children’s game in Mexico is The
Blind Hen.
Playing this game is lots of fun. You
start by choosing one child to be
the hen and covering their eyes so
that they can’t see. Turning the child
around and around makes the game
more difficult.
It’s time for the hen to start finding
and tagging the other children.
The other children enjoy running
around and calling the hen. Saying
things like “Come and get me!” or
“I’m over here!” makes the game
more exciting. After tagging all the
children, the hen can have a rest and
another child can try being the blind
hen.

C
Numbers from top down:
6, 3, 1, 2, 5, 4
1 The first step is choosing a child to
be the hen.
2 The next step is covering the
child’s eyes.
3 Turning the child around and
around is a good idea.
4 Finding and tagging the other
children isn’t easy!
5 Running around and calling the
hen is fun!
6 The hen has a rest after tagging all
the children.

Page 9
B
1 playing
2 running
3 being
4 covering
5 finding
6 playing
7 throwing
8 catching
9 playing
10 being
11 playing
12 Swimming

1


C
I love playing The Blind Hen. It’s my
favorite game!
I like running around, but I don’t like
being the hen. I hate covering my
eyes!
Really? I enjoy finding my friends
when I can’t see. It’s lots of fun!
I prefer playing ball games. I’m
good at throwing and I’m good at
catching.
Are you interested in playing team
sports?
Yes, I am. I’m on the school
basketball team. Being part of a
team is great.
I don’t like playing basketball.
Swimming is my favorite sport.

Page 10
E
1 We enjoy playing basketball.
2 Doing sports is good for you.
3 I love running in the playground.
4 Tom is good at jumping.
F

1 She likes running.
2 He’s good at bouncing a ball.
3 They enjoy jumping.
4 He hates playing soccer.
5 She loves skipping.
6 They like climbing.

Page 11
G
1 playing
2 Starting
3 standing
4 holding
5 being
6 chasing
7 trying
8 catching
9 Running
10 Having
H
Students’ own answers

Module 1 Review
Page 12
A
1 interested
2 exciting
3 tired
4 interesting
5 disappointed

6 excited
7 tiring
8 disappointing

B
1 c
2 b
3 e
4 f
5 a
6 d
Gerund: S(ubject) or O(bject)
1 S
2 O
3 S
4 S
5 O
6 O
C
1 Katie loves jumping rope.
2 Sam is good at climbing.
3 Lucy enjoys running.
4 Tara is interested in skateboarding.
5 Jack likes playing tennis.

Page 13
D
1 excited
2 going
3 watching

4 bored
5 running
An amazing match ✓
E
Students’ own answers

Unit 3
Page 14
B
My grandpa is from Guatemala. In
Guatemala, lots of men can crochet.
My grandpa can crochet beautiful
bags and hats. My grandparents
moved to the U.S. in 1970. In those
days, lots of people could crochet,
knit, and sew. My grandma could
knit when she was a little girl. She
couldn’t crochet then, but she can
crochet now.
When my mum was a little girl, she
couldn’t knit or crochet. She couldn’t
sew then either, but she can sew
now. She can make amazing dresses!
I can’t knit or sew, but I’m learning to
crochet. A year ago, I couldn’t make
many things, but now I can make lots
of things!
C
1 can
2 could

3 couldn’t
4 can
5 couldn’t
6 can

Oxford Discover Grammar  Student Book 3 Answer Key  © Oxford University Press

Page 15
B
1 c
2 a
3 c
4 c
C
1 can
2 can’t
3 can
4 Could
5 couldn’t
6 could
F
I can’t knit, but I can crochet. Can you
crochet?
No, I can’t.
Can you sew?
Yes, I can. I can sew and I can knit.
Could you knit when you were six?
No, I couldn’t. But I could sew then.

Page 16

F
1 can
2 couldn’t
3 could
4 can
5 couldn’t
6 could
7 couldn’t
8 can
G
2 No, he couldn’t.
3 Yes, she could.
4 Yes, she can.
5 No, he couldn’t.
6 Yes, he can.
H
1 couldn’tcan’t
2 couldn’tcan
3 couldn’tcan
4 couldn’tcan’t
5 couldn’tcan’t
6 couldcan

Page 17
I
2 David could paint when he was six
years old.
3 David could sew when he was six
years old.
4 David can’t crochet now.

5 David can’t cook now.
6 David can draw now.
J
Students’ own answers

2


Unit 4
Page 18

B
Piñatas are traditional in Mexico.
When you make a piñata, you need
a balloon and some papier mâché. A
piñata can be any shape. If you use
a round balloon, you get a round
piñata.
Put papier mâché (paper and glue)
on the balloon. When the papier
mâché is dry, it stays in the shape of
the balloon. Now you can pop the
balloon!
Cut a small hole in the piñata and
fill the piñata with candy. When
the piñata is full of candy, it’s ready
for you to decorate it with paint or
colored paper.
When people have parties, they
often have piñatas. The piñata

is hung from a tree or post and
children hit it with sticks. If the
piñata breaks, lots of candy falls out!
C
1 f
2 d
3 e
4 a
5 c
6 b

Page 19
B
1 need
2 make
3 get
4 put
5 use
6 paint
7 make
C
Look, Luis. I’m making a piñata.
Do you have lots of glue? You need
lots of glue when you make a piñata.
I know. You need lots of paper when
you make a piñata, too. If you mix
glue and paper together, you get
papier mâché.
Papier mâché is great. When you put
it on a balloon, it dries in the shape

of the balloon.
I know. If you a use a long balloon,
you get a long piñata. Piñatas look
better when you paint them. Let’s
paint this one red.
Oh! Look at the table. You make a big
mess when you make piñatas!

Page 20
E
1 a
2 b
3 c
4 b
5 a
6 c
7 b
8 a

Page 21
G
1 f
2 Does your grandpa tell you
stories b
3 Are there always lots of people d
4 Is it exciting e
5 Does your mum make a cake c
6 Do the children wear their best
clothes a
H

2 When we have family parties, we
decorate our homes.
We decorate our homes when we
have family parties.
3 When it gets dark, we watch
fireworks.
We watch fireworks when it gets
dark.
I
Students’ own answers

Module 2 Review
Page 22
A
1 can
2 can
3 could
4 can
5 couldn’t
6 can
7 can’t
8 can
B
1 Could
she could
2 Could
they couldn’t
3 Can
he can
4 Could

I couldn’t
5 Can
I can’t
6 Can
she can
C
2 The lantern goes up into the sky
when the paper is hot.
3 It’s an amazing sight if there are
lots of sky lanterns in the sky.
4 You get good luck if you send a
sky lantern into the sky.

Oxford Discover Grammar  Student Book 3 Answer Key  © Oxford University Press

D
1 Is it traditional to have a piñata
when you celebrate in Mexico?
Yes, it is.
2 Do you use a ball when you make
a piñata? No, you don’t.
3 Are there lots of sweets inside a
piñata when it is ready? Yes, there
are.
4 Does a piñata break if you hit it
with a stick? Yes, it does.

Page 23
E
1 c

2 a
3 a
4 c
5 b
6 c
7 b
8 a
F
Students’ own answers

Unit 5
Page 24
A
Robbie was looking for his pet
grasshoppers, Hoppy and Happy, but
their jar was empty.
Dad was watering the plants in the
garden.
“Were you working in the garden all
morning, Dad?” Robbie asked.
“Yes, I was,” said Dad.
Emma was playing in the garden.
“Did you open this jar, Emma?”
Robbie asked.
“Yes,” said Emma. “I’m sorry! I wasn’t
looking for grasshoppers. I was
looking for a cookie!”
Then Robbie saw Hoppy and Happy!
The grasshoppers were sitting on a
leaf. Robbie was very happy!

B
1 was
2 was
3 was
4 were

Page 25
B
1 was shining
2 were sitting
3 was climbing
4 was trying
5 was flying
6 was writing

3


Page 26
C
1 Was
2 wasn’t
3 was
4 Was
5 wasn’t
6 was
7 Was
8 was
10 were
D

What happened in the story? Was
Robbie looking for two beetles?
No, he wasn’t. He was looking for
two grasshoppers.
Was Robbie’s dad working in the
kitchen?
No, he wasn’t. He was watering the
plants in the garden.
Was Robbie’s little sister playing in
the garden?
Yes, she was. And the grasshoppers
were sitting on a leaf!
F
1 wasn’t watering
2 was making
3 wasn’t washing
4 was reading
5 wasn’t playing
6 was doing
7 weren’t watching
8 were kicking

Page 27
G
1 Was Mum talking on the phone?
No, she wasn’t.
2 Was Dad reading a book? Yes, he
was.
3 Were the boys playing a board
game? Yes, they were.

4 Were the girls writing letters? No,
they weren’t.
5 Was Grandma making a cake? Yes,
she was.
6 Was Grandpa helping Grandma?
No, he wasn’t.
7 Were the cats playing with a ball?
No, they weren’t.
H
Students’ own answers

Unit 6
Page 28
B
My name’s Felix. Yesterday evening,
my friends and I were all at school.
We were getting ready for our school
play when the lights went out. We
couldn’t see! I was trying to find
the light switch when the teacher
opened the door. The teacher was
holding a flashlight while she looked
for some candles. She was lighting
lots of candles when our parents
came into the school. The teacher
gave our parents candles in glass jars
while she was selling tickets. She put
lots of candles in jars on the stage,
too. When our parents were sitting
down, the teacher asked them to

blow out their candles. We were
finishing the play when the lights
came on again. Everyone laughed!
C
Numbers from top down, with
matching events:
5 b
4 f
2 g
3 a
7 c
1 e
6 d
1 The lights went out. The children
were getting ready for their play.
2 The teacher opened the door. Felix
was trying to find the light switch.
3 The teacher looked for some
candles. The teacher was holding a
flashlight.
4 The parents came into the school.
The teacher was lighting candles.
5 The teacher gave the parents
candles. The teacher was selling
tickets.
6 The parents blew out their
candles. The parents were sitting
down.
7 The lights came on again. The
children were finishing their play.

Oxford Discover Grammar  Student Book 3 Answer Key  © Oxford University Press

Page 29
B
1 was coming
2 saw
3 were performing
4 fell
5 were helping
6 was walking
7 was trying
8 stopped
9 arrived
C
I’m sorry I’m late! While I was coming
to meet you I saw an accident.
Really? Where?
It was in the park. I was walking in
the park when I saw some actors on
a stage. They were performing a play
when I saw them. One of the actors
was running on the stage when he
fell off.
Oh no! Were there lots of people
there?
Yes, there were. Lots of people were
helping the actor when a doctor
arrived.
Wow! The doctor arrived very

quickly!
Well, the doctor was walking in the
park when he saw the accident. He
was trying to call an ambulance
when his cell phone battery ran
out. I was standing near him when
his phone stopped working. I had
my phone with me, so I called the
ambulance. I was trying to call you
when the ambulance arrived. I
wanted to tell you why I was late!
It’s OK. You’re here now!

Page 30
F
1 She was reading her script.
2 No, he wasn’t.
3 They were painting.
4 Yes, they were.
5 He was talking on his cell phone/
wearing a monster costume.

4


Page 31

Page 33

G

2 When I was walking off the stage, I
fell down the steps.
I was walking off the stage when I
fell down the steps.
3 When I was lying on the floor, the
teacher saw me.
The teacher saw me when I was
lying on the floor.
4 While the teacher was calling
an ambulance, the school nurse
helped me.
The school nurse helped me
while the teacher was calling an
ambulance.
5 While the school nurse was
looking at my leg, the ambulance
came.
The ambulance came while the
school nurse was looking at my
leg.
6 When I was lying in a bed, my
mom arrived at the hospital.
My mom arrived at the hospital
when I was lying in a bed.
7 While I was resting at home, the
doorbell rang.
The doorbell rang while I was
resting at home.
8 When my mom opened the door,
my friends were standing outside.

My friends were standing outside
when my mom opened the door.
H
Students’ own answers

C
1 was playing with
2 when it ran
3 was looking up
4 was climbing
5 the man was trying
6 while the man
7 cell phone rang
8 was calling
D
Students’ own answers

Module 3 Review
Page 32
A
1 weren’t practicing were practicing
2 wasn’t writing
was talking
3 wasn’t reading
was reading
4 wasn’t painting was taking
5 weren’t taking
were painting
B
1 Were you riding your bike when

you had the accident?
2 Were you sleeping when I called
you?
3 Tom wasn’t watching TV when his
dad came home.
4 They were having a picnic when it
started to rain.
5 While we were talking, I had a
great idea.
6 What was Jenny wearing when
you saw her?

Unit 7
Page 34

B
Hi Nico,
How are you? I’m very excited
because we’re going on vacation
tomorrow. We’re going to the Bay
of Fundy in Canada. We will see the
highest tides in the world there.
There will be two high tides and two
low tides every day. When there is a
high tide, 100 billion tons of water
will move into the bay. The water will
be as high as a four-story building!
We’ll go tidal-bore rafting on the
water. I can’t wait!
When there is a low tide in the Bay

of Fundy, all the water will move out
of the bay, and we’ll see the seabed.
We’ll hunt for fossils in the sand and
we will explore the caves.
I’ll be back in two weeks! See you
soon!
Luis
C
1 b
2 e
3 f
4 a
5 c
6 d

Page 35
B
1 b
2 c
3 b
4 b
5 a
6 c

Oxford Discover Grammar  Student Book 3 Answer Key  © Oxford University Press

C
I’m going to the airport soon.
Tomorrow, I will be in Bangkok.
You’re so lucky. Will you have a long

flight?
Yes, I will. I’ll be on the plane for
more than 20 hours.
Wow! When you do leave Mexico
City?
At four o’clock this afternoon. So I’ll
be in Bangkok at noon tomorrow.
Well, it will be noon here, but it will
be midnight in Bangkok.
Really?
Yes. There’s a twelve-hour time
difference. When it’s two o’clock in
the afternoon in Mexico City, it will
be two o’clock in the morning in
Bangkok.

Page 36
E
1 won’t need
2 will see
3 will move
4 will be
5 will get
6 will be
7 will get
8 will get
9 won’t be
10 will be
F
1 Yes, it will.

2 No, it won’t.
3 Yes, it will.
4 No, it won’t.
5 Yes, it will.
6 Yes, it will.

Page 37
H
2 It will be Thursday tomorrow.
3 It will be June 23 on Friday.
4 It will be September in three
months.
5 It will be Friday on June 30.
6 It will be 2018 next year.
I
Students’ own answers

5


Unit 8
Page 38

B
Bruno and André are from Brazil.
They’re explorers, and next week,
they’re going to start an exciting trip.
They’re going to travel around the
world in eighty days. They’re going
to make the trip that Jules Verne

wrote about in his famous book.
They’re not going to travel by plane.
They’re going to use transportation
from the 19th century. They’re going
to travel by boat and train. In India,
they’re going to ride elephants. In
the snowy parts of North America,
they’re going to travel by sled.
They’re not going to take a lot of
luggage because they’re going to
carry their bags all the time. They’re
going to visit lots of different
countries. It’s going to be an
amazing trip!
C
1 F
2 F
3 T
4 T
5 F
6 T

Page 39
B
1 I’m going to visit New York this
summer.
2 My parents are going to travel
with me.
3 We’re not going to travel by boat.
4 I’m going to take my passport.

5 My brother isn’t going to come
with us.
6 He’s going to go on a school trip.

Page 40
C
1 ’m going to visit
2 ‘m going to stay
3 is going to come
4 aren’t going to come
5 ‘re going to stay
6 ‘m going to swim
7 is going to sail
8 ‘s going to catch
9 ‘m not going to catch
10 are going to collect

D
What are you going to do this
summer, Mai?
I’m going to visit my grandparents.
I’m going to stay with them for two
weeks. My brother is going to come
with me.
That’s nice. What about your parents?
They aren’t going to come with
us. They’re going to stay at home
because they’re very busy.
I see. Where do your grandparents
live?

They live near the sea. I’m going to
swim every day. My brother’s going
to sail in a little boat and he’s going
to catch fish. I’m not going to catch
fish. Grandma and I are going to
collect shells on the beach.
That sounds great. Lucky you!
F
3 She’s going to sit in the sun.
4 She isn’t going to wear warm
clothes.
5 She’s going to read books.
6 She isn’t going to listen to music.
7 She’s going to take photos.
8 She’s going to swim.

Page 41
G
2 Who is he going to go with?
His family.
3 When are they going to leave?
On Monday.
4 How are they going to travel?
By plane.
5 Where are they going to stay?
In a hotel.
6 What is John going to do on
vacation?
Swim and relax on the beach.
H

Students’ own answers

C
2 John isn’t going to have lessons.
He’s going to have fun.
3 John and his uncle aren’t going to
build a house.
They’re going to build a boat.
4 John and his cousins aren’t going
to play soccer.
They’re going to play basketball.
5 John and his brother aren’t going
to catch butterflies.
They’re going to catch fish.
6 John isn’t going to swim in a pool.
He’s going to swim in the sea.

Page 43
D
1 c
2 a
3 a
4 b
5 c
6 a
7 c
8 b
E
1 What is Tony going to do on
Saturday morning?

He’s going to play soccer with his
friends.
2 What is Tony going to do on
Saturday afternoon?
He’s going to go shopping with his
brother.
3 What is Tony going to do on
Saturday evening?
He’s going to watch a movie with
his family.
4 What is Tony going to do on
Sunday morning?
He’s going to visit his
grandparents and learn how to
catch fish.
Students’ own answers

Module 4 Review
Page 42
A
3 It will be September in ten days.
4 It will be August 26 on Sunday.
5 It won’t be Saturday in four days.
6 It won’t be October next month.
B
1 No, it won’t.
2 Yes, it will.
3 No, it won’t.
4 Yes, it will.

Oxford Discover Grammar  Student Book 3 Answer Key  © Oxford University Press

6


Unit 9
Page 44

B
Coal and oil are fossil fuels. The gas
in cars comes from oil. Today, lots of
cars use gas, but one day the oil will
run out and we will have no gas. We
will need a new kind of car.
Electric cars might be the answer to
this problem. Electric cars won’t use
fossil fuels. One day, there may be
more alternative energy to power
electric cars, too. In the future,
people might use wind power to
make electricity for their electric cars.
Hydrogen-fuel-cell cars may be more
popular than electric cars one day.
Electric cars have batteries, and their
batteries might run out on long trips.
In the future, hydrogen-fuel-cell cars
might create electricity while they
are moving, so people may not need
to stop for fuel.
Sentences that express certainty:

First paragraph
Sentences that express uncertainty:
Both second and third paragraphs

Page 45
B
1 won’t
2 won’t
3 might
4 may
5 might not
C
1 won’t be
2 might build
3 will use
4 might not have
5 might solve
6 will need

Page 46
D
1 might not look
2 might be
3 might live
4 might make
5 might not need
6 might put
7 might have
8 might collect
E

1 b
2 a
3 e
4 c
5 d

F
1 We may drive flying cars in the
future.
2 We might not have any coal or oil
in fifty years.
3 One day, people might live in
underground homes.
4 In twenty years, we might use
more wind power.

Page 47
G
2 We may/might not use pens in the
future.
3 We may/might travel to other
planets in the future.
4 We may/might ride bikes in the
future.
5 We may/might live in underwater
houses in the future.
6 We may/might not go to school in
the future.
H
Students’ own answers

Unit 10
Page 48
B
2 a lot of
3 a few
4 some
5 some
How many plastic bags do you have
at home? You can do a lot of things
with plastic bags.
Use a few plastic bags and an iron to
make a strong shopping bag.
Cut some plastic bags into long
strips. You can use the strips to tie a
lot of different things. You can use
them to knit or crochet some fun
plastic items, too!
Keep a few plastic bags in your jacket
pocket. You can reuse them when
you go shopping.
How many ways to reuse plastic bags
can you think of? Send us some of
your ideas!

Page 49
B
Count Nouns: bag ​idea ​magazine ​
carton ​bottle ​car
Noncount Nouns: ​plastic ​money ​

energy ​pollution ​water ​traffic

Oxford Discover Grammar  Student Book 3 Answer Key  © Oxford University Press

Page 50
D
1 much
2 A little
3 a lot
4 a few
5 some
6 a little
7 many
8 A lot!
9 a few
10 some
E
How much trash do you throw away,
Asim?
A little. My family and I recycle a lot
of our trash.
That’s good. Do you reuse things,
too?
Well, we reuse a few things. We reuse
some of our plastic bags. We reuse
a little newspaper, too. What about
you? How many things do you reuse?
A lot! We reuse a lot of bottles and
a few jars. We reuse a lot of plastic
bags, too. I use some of our plastic

bags to crochet cool bags! Look at
these!
They’re great!

Page 51
G
3 There is (only) a little metal.
There are a few/two cans.
4 There is a lot of cardboard.
5 There are (only) a few/five
batteries.
6 There is (only) a little paper.
7 There is one magazine.
8 There is a lot of glass.
9 There are two cans.
H
Students’ own answers

Module 5 Review
Page 52
A
2 drive flying cars in the future
3 There won’t be fossil fuels in the
future.
4 People might have robots in the
future.
5 We will need electricity in the
future.
6 Cars won’t use gas in the future.
B

1 some
2 any
3 one
4 any
5 some
6 one
7


C
2 much
3 a little
4 many
7 a few
8 many

Page 53
D
1 d
2 e
3 b
4 c
5 f
E
Students’ own answers

Unit 11
Page 54
B
Tomas wants to learn to play an

instrument. He’s in the biggest music
store in town.
The kettledrums are the most
enormous instrument in the shop.
But Tomas’s bedroom is only small.
The cymbals are smaller than the
kettledrums. But they’re the noisiest
instrument. Tomas lives in an
apartment.
The piano is quieter than the
cymbals. It’s more relaxing, too. But
the piano is the heaviest instrument,
and it’s the most difficult instrument
to move from one place to another!
The violin is the most beautiful
instrument. …
… But it’s more difficult to play than
the guitar.
Tomas decides to learn to play the
triangle. It’s the easiest instrument to
carry and it’s the easiest instrument
to play!

Page 55
B
1 The piano is bigger than the
electric guitar.
2 The electric guitar is smaller than
the piano.
3 The piano is more traditional than

the electric guitar.
4 The electric guitar is more modern
than the piano.
5 The piano is heavier than the
electric guitar.
6 The electric guitar is lighter than
the piano.

Page 56
C
1 biggest
2 most enormous
3 smallest
4 most difficult
5 best
6 smaller
7 bigger
8 more difficult
D
Are you in the school orchestra,
Sasha?
Yes, I am. I play the piano. It’s the
biggest instrument in the orchestra.
That’s cool. The double bass is big
too, isn’t it?
Yes, it is! It’s the most enormous
string instrument. Masha plays the
double bass in our orchestra.
Masha? But she’s the smallest girl
in the school, and the double bass

is the most difficult instrument to
carry!
I know. But she’s the best double
bass player in the school.
I can play the cello. It’s smaller than
the double bass, but it’s bigger than
the violin.
Is the cello more difficult than the
violin?
I don’t know. I can’t play the violin!
F
2 The triangle is the smallest
instrument.
3 The triangle is the cheapest
instrument.
4 The harp is the most expensive
instrument.
5 The harp is the heaviest
instrument.
6 The triangle is the lightest
instrument.
7 The horn is the noisiest
instrument.
8 The harp is the most relaxing
instrument.

Page 57
G
1 b
2 c

3 b
4 a
5 b
6 b
7 a
8 b
9 b
10 c
H
Students’ own answers

Oxford Discover Grammar  Student Book 3 Answer Key  © Oxford University Press

Unit 12
Page 58
B
Music is as old as the human race.
The earliest humans were as musical
as people today. Their instruments
weren’t as complex as instruments
today, but they made a lovely sound.
In Europe in the 17th and 18th
centuries, classical music was as
popular as pop music is today.
Composers like Beethoven and
Mozart were as famous as today’s
pop stars!
Jazz isn’t as old as blues, but it’s as
popular as blues. Both types of music
come from the U.S.

Modern instruments aren’t as easy
to play as the earliest instruments,
but they make great sounds! Modern
music is as interesting as traditional
or classical music, because it is part
of our amazing musical history.
There are six positive sentences and
three negative sentences.

Page 59
B
2 not as old as blues.
3 Pop music is not as modern as rap.
4 Mozart is as famous as Beethoven.
C
3 not as noisy as
4 as exciting as
5 not as expensive as
6 not as modern as
7 not as big as
8 as small as
D
Do you like pop music, Shen?
It’s OK, but it’s not as good as rock
music.
I don’t agree. Pop music is not as
noisy as rock music, but it is as
exciting as rock music.
Do you buy lots of CDs?
Not really. I buy MP3s. They’re not as

expensive as CDs.
That’s true. CDs are not as modern as
MP3s, but I like CDs.
Me too, but MP3 players are not
as big as CD players. My MP3player is
as small as a cell phone. I can put it in
my pocket!

8


Page 60

Page 63

F
2 Rock music isn’t as relaxing as pop
music.
3 Classical music is as exciting as
jazz.
4 Jazz isn’t as relaxing as classical
music.
5 Rock music is as boring as jazz.
6 Hip hop is as relaxing as rock
music.
7 Classical music isn’t as exciting as
pop music.
8 Hip hop isn’t as boring as jazz.

C

1 orchestra
2 trombone
3 conductor
4 triangle
5 double bass
6 electric guitar
7 piano
D
Students’ own answers

Page 61
H
2 Were as complex as – e
3 Are as small as – a
4 Was as famous as – f
5 Is
as popular as – d
6 Are as modern as – c
I
Questions:
1 Is pop music as exciting as rock
music?
2 Is jazz as relaxing as blues?
3 Is classical music as interesting as
rap?
4 Is rock music as entertaining as
pop music?
5 Are pop bands as cool as rock
bands?
6 Are CDs as good as MP3s

Students’ own answers
J
Students’ own answers

Module 6 Review
Page 62
A
1 largest
2 more expensive
3 smaller
4 most important
5 heavier
6 most beautiful
B
3 The cello is cheaper than the
double bass.
4 The violin is the most expensive
instrument.
5 The cello is bigger than the violin.
6 Is the double bass more expensive
than the violin? No, it isn’t.
7 Is the violin the smallest
instrument? Yes, it is.
8 Are the double bass and the cello
cheaper than the violin? Yes, they
are.

Unit 13
Page 64
B

In the 19th century, Alexander
Graham Bell was working on a new
invention. He was trying to invent
a telephone. Other scientists were
trying to invent telephones, too.
Antonio Meucci and Johann Philip
Reis made telephone machines.
So did Elisha Gray. On February 14,
1876, Gray’s invention was ready.
Bell’s invention was ready, too. Gray
hurried to the U.S. Patent Office to
get a licence for his invention. So
did Bell. But Bell got there first. Gray
did not become rich and famous.
Meucci didn’t become rich and
famous, either. Neither did Reis.
But we remember them today as
important people in the history of
the telephone.
So and too agree with something
positive. Either and neither agree
with something negative.
C
1 too
2 So
3 Neither
4 either

D
What do you know about Alexander

Graham Bell, Carlos?
I know that he helped deaf people.
His father helped deaf people, too.
Bell’s mother was deaf. So was his
wife.
Really? Was Bell a doctor?
No, he wasn’t. He was a teacher. His
father was a teacher, too.
Was Bell from the U.K.?
Yes, he was. But he moved to Canada
in 1870. So did his parents. Bell
started his work on the telephone in
Canada.
In the 1870s, people didn’t have
telephones. They didn’t have
computers, either.
That’s right. Houses didn’t have
telephones then. Neither did offices.
But Bell changed that with his
amazing invention.
F
2 Neither did offices.
3 So was his mother.
4 His parents didn’t, either.
5 Neither was his father.
6 His father was, too.
7 His parents weren’t, either.
8 So did his father.

Page 67

G
1 g
2 f
3 c
4 d
5 a
6 e
7 b

Page 65
E
1 c
2 b
3 a
4 c
5 b
6 a

Page 66
C
1 too
2 So
3 too
4 So
5 either
6 Neither

Oxford Discover Grammar  Student Book 3 Answer Key  © Oxford University Press

9

Unit 14
Page 68
B
Orville and Wilbur Wright wanted to
fly when they were small boys. They
liked to play with flying toys.
When the boys were older, they
decided to make a flying machine. In
1900, they built a glider. It didn’t fly
very quickly, and it didn’t fly very far.
In 1903, Wilbur and Orville
successfully made the world’s first
airplane flight. Their plane flew
further than the glider. It flew more
quickly than the glider, too. But
it only stayed in the sky for one
minute.
The Wright brothers made another
plane in 1908. It was their best
machine. It flew the most quickly.
It flew the furthest, too. People
watched excitedly as the plane
stayed in the air for thirty minutes. It
was a wonderful sight!
Adverbs: quickly, far, successfully,
excitedly
Comparative adverbs: more quickly,
further

Superlative adverbs: the most
quickly, the furthest

Page 69
B
1 nervously
2 slowly
3 quickly
4 suddenly
5 tightly
6 loudly
7 excitedly
8 proudly

Page 70
C
1 c
2 a
3 c
4 a
5 b
6 a

more easily
more slowly
more quickly
more regularly
the most regularly
the fastest

D
What’s your favorite invention, Ali?
I love computers. They’re brilliant.
Computers help us do everything
more easily.
What was the world like before
computers?
Well, I think children did their
homework more slowly than we
do, because they didn’t have the
Internet!
That’s true. Today, we can find
information more quickly than
people in the past. Do you use the
Internet regularly?
I use it more regularly than my
brother. He never goes online. But
my sister uses the Internet the most
regularly. She’s always online!
[With a light laugh] Is she? [Pause]
Can you type fast on your computer?
Yes, I can. I can type the fastest of all
the children in my class!
F
1 far
2 clearly
3 more clearly
4 further
5 the furthest
6 the most clearly

Page 71
G
2 You can travel the most quickly by
plane.
3 You can travel the furthest by
plane.
4 You can travel more cheaply by car
than by plane.
5 You can travel the most cheaply by
bike.
6 You can travel further by car than
by bike.
H
Students’ own answers

Module 7 Review
Page 72
A
1 too
2 So
3 Neither
4 either
5 too
6 Neither
B
1 carefully
2 clearly
3 well
4 quickly

5 happily
6 easily

Oxford Discover Grammar  Student Book 3 Answer Key  © Oxford University Press

C
2 You can send messages the most
quickly by phone.
3 You can travel more cheaply by
train than by plane.
4 The can travel the most cheaply by
bus.
5 You can see further with
binoculars than with your eyes.
6 You can see the furthest with a
telescope.
7 You can type more easily on a
tablet than on a cell phone.
8 You can type the most easily on a
computer.

Page 73
D
1 a
2 b
3 b
4 a
5 a
6 b
7 c

8 a
9 b
10 a
F
Students’ own answers

Unit 15
Page 74

B
How to Make Easy Mini Pizzas
8 tomatoes, cut into slices
4 cups of grated cheese
1 can of chopped tomatoes
Some dough
1 tablespoon of olive oil
1 teaspoon of oregano
Some olives
First, put a piece of baking paper on
a baking tray. Spread the olive oil on
the baking paper.
Second, cut two or three rounds of
dough and put them on the baking
paper.
Third, put some chopped tomatoes
on each round of dough.
Fourth, put a slice of tomato, some
cheese, a little oregano, and a few
olives on each round.
Fifth, cook the mini pizzas in the

oven for ten minutes.
Finally, eat your mini pizzas!
Countable nouns: tomato(es), olives,
pizza
Uncountable nouns: cheese, dough,
olive oil, oregano
10


Page 75
B
1 N
2 N
3 C
4 C
5 N
6 N
7 C
8 N
9 N
10 C
11 N
12 C
C
1 How much
2 How many
3 How much
4 How many
5 How much
6 How many

7 How much
8 How many

Page 76
E
1 bowl
2 bar
3 slices
4 bag
5 jar
6 bottle
7 carton
8 glass

Page 77
F
1 acarton
2 abag
3 bbar
4 ccarton
5 ccup
6 apiece
G
Let’s make a cake for Grandma and
Grandpa.
That’s a good idea. What do we
need?
We need a carton of eggs, and some
butter.
OK. Do we need a bag of flour?

No. There’s a lot of flour in the
cupboard. But we need a bar of
chocolate for the cake.
OK. Do we need a carton of milk?
No. We’ve got some milk in the
fridge. But we need some coffee.
Why? Are we making a coffee cake?
No. But Grandma always drinks a cup
of coffee when she eats a piece of
cake!

I
Students’ own answers

Unit 16
Page 78

B
Food labels on packages, cartons,
and cans give us information about
the foods we buy.
Are you worried about eating lots
of chemicals? You can read the list
of ingredients. People are often
surprised by how many chemicals
are in some products. You should
also read the label if you’re afraid
of eating something that you are
allergic to.
If you’re interested in eating

healthily, you can find out how much
salt, fat, etc., is in a product. Don’t
buy it if you’re not happy with it.
Are you curious about how to cook
the product? Read the instructions
on the label.
If you’re not sure about what a
product is, you can look at the
picture!
1 interested in
2 worried about
3 curious about
4 sure about
5 surprised by
6 afraid of
7 allergic to
8 unhappy with

Page 79
B
1 in
2 of
3 about
4 of
5 about
6 of
7 about
8 about

Oxford Discover Grammar  Student Book 3 Answer Key  © Oxford University Press

C
Are you interested in eating healthily,
Kamil?
Of course. I think it’s silly of people to
eat lots of junk food.
Me too. I’m worried about the
amount of junk food people eat.
Junk food is full of fat and chemicals.
I know. I’m angry about the number
of chemicals that food companies
put in their products. It’s very bad of
them to use a lot of chemicals.
I know. I’m not happy about that,
either. We have to read food labels
very carefully these days.
We do. But I’m excited about the
food for our party!

Page 80
E
1 at
2 in
3 about
4 by
5 about
6 of
7 of
8 about
F

2 I’m disappointed with these
cookies. They’re not very nice.
3 My brother isn’t interested in
cooking.
4 We’re surprised by how much
sugar there is in fruit juice.
5 Italy is famous for its pizza and
pasta.
6 The children are excited about
going to a restaurant for dinner.

Page 81
G
Possible answers:
I’m good at making pizza.
I’m disappointed with the cake I
made yesterday. It’s too dry.
I’m interested in trying food from
different countries.
I’m worried about the amount of
junk food children eat.
I’m surprised by how cheap fruit is at
this market.
I’m happy with the cake I made.
H
Students’ own answers

11

Module 8 Review

Unit 17

Page 82

Page 84

A
1 much
2 many
3 many
4 much
5 much
6 many
B
1 bowl
2 carton
3 jar
4 cup
5 bar
6 slice
C
1 about
2 at
3 with
4 of
5 about
6 of

B
What Do You Do in a Hurricane?

Page 83
D
1 carton
2 excited
3 carton
4 bar
5 happy
6 cup
A nice surprise ✓
E
1 His favourite food is vanilla
cookies.
2 You need a small packet of
butter, a cup of sugar, four cups
of flour and two cups of walnuts
to make the cookies. You need
two teaspoons of vanilla and a
teaspoon of salt, too.
3 First, mix the butter, sugar, salt,
vanilla and walnuts in a bowl.
Second, mix in the flour. Third,
put a piece of baking paper on a
baking tray. Fourth, put small balls
of cookie mixture on the baking
paper. Fifth, cook the cookies for
fifteen minutes. Finally, cover the
cookies in sugar.

Students’ own answers

Before a Hurricane …
• Bring garden furniture into the
house.
• Put boards over your windows.
• Get some money from the bank.
Get a first aid kit, some cans of
food, and some bottles of water
from the supermarket.
During a Hurricane …
• Go into a building and stay there.
• If your home is in a low area, go
up to a higher place or go to a
hurricane shelter.
• Listen to the radio. If it’s time to get
out of the area, follow instructions
and leave.
After a Hurricane …
• Don’t drive through flooding water.
• Don’t walk under damaged trees,
buildings, or bridges.
Prepositions which show where to
go: into, over, from, up to, to, out of,
through, under
C
1 Bring garden furniture into the
house.
2 Put boards over your windows.
3 Listen to the radio during a

hurricane.
5 Go to a higher place if your home
is in a low area.

Page 85
B
1 Don’t jump!
2 Take off your boots!
3 Don’t run!
4 Come into the house!

Page 86
H
1 into
2 out of
3 down
4 up
5 around
6 through
7 over
8 under

Oxford Discover Grammar  Student Book 3 Answer Key  © Oxford University Press

Page 87
E
2 to
3 up
4 through
5 over

F
Possible answers:
1 Walk around the school and go
over the road.
2 Go over the bridge. Walk through
the park. Go down the steps. Walk
along the road.
3 Walk along the road to the police
station. Go up the steps, and
through the park.
4 Walk through the park, and go
down the steps.
G
Students’ own answers

Unit 18
Page 88
B
Jordan Romero wanted to be a
mountain climber when he was a
little boy. When he was fifteen, he
became the youngest person to
climb the seven highest mountains
in the world, including Mount
Everest.
Mountain climbers need to work
hard to get fit. Jordan trains a lot. He
also runs and rides his bike. Before
he climbed Mount Everest, Jordan
wanted to be very fit and very

strong. When you climb a mountain,
you have to climb for long hours
in the cold, with a heavy backpack.
Your body has to be ready for that,
and your mind has to be ready,
too. You need to have the right
equipment, and you have to have a
good team.
C
1 ✗
2 ✓
3 ✗
4 ✓
5 ✗
6 ✓

12


Page 89

Page 91

Page 93

B
1 We’re training at the moment.
2 I go to the gym every Monday.
3 She joined a climbing group last
year.

4 I was doing my homework at five
o’clock.
5 Was he running when you saw
him?
C
1 Were you riding
2 Did he go
3 Does she run
4 Were they climbing
5 Did it start
6 Did he buy
7 Do you ski
8 Are they packing

H
1 Do you have / need to wear a life
vest? Yes, you do.
2 Do you have / need to be able to
swim? Yes, you do.
3 Do you have / need to bring a
compass? No, you don’t.
4 Do you have / need to wear
sunglasses? No, you don’t.
5 Do you have / need to bring a
camera? No, you don’t.
6 Do you have / need to listen to
instructions? Yes, you do.
7 Do you have / need to make sure
the boat is safe? Yes, you do.
8 Do you have / need to be able to

surf? No, you don’t.
I
Students’ own answers

D
1 wanted to
2 had to
3 didn’t need to
4 don’t want
5 want to
6 don’t need to
7 need to
8 have to
E
1 to
2 Don’t
3 from
4 through
5 into
F
Students’ own answers

Page 90
E
1 Do you want to
2 Do we need to
3 have to
4 want to
5 want to
6 need to

7 need to
8 had to
9 wanted to
F
Do you want to go on the school trip
to the zoo tomorrow, Ji-Min?
Yes, I do! I can’t wait! Do we need to
take sandwiches with us?
No, we don’t. We’re going to have
lunch in a cafeteria. We have to take
some money with us.
OK. I want to take my camera, too.
I want to take lots of photos of the
animals.
You don’t need to take your camera.
You can buy postcards with pictures
of all the animals.
That’s true. But I like taking photos.
Do we need to bring warm clothes
on the trip?
No, we don’t. It’s going to be sunny
tomorrow. When I went to the zoo
two months ago, it was very cold!
I had to wear my dad’s jacket! I
wanted to stay in the cafeteria all day
to keep warm! I’m glad we’re going
to the zoo in the summer this time!

Module 9 Review
Page 92

A
1 Wear
2 Don’t eat
3 Don’t wear
4 Don’t play
5 Eat
6 Play
B
1 over
2 through
3 around
4 up
5 to
6 into
C
1 went
2 is riding
3 Are you training
4 were playing
5 exercised
6 Are they running
7 Were you climbing
8 bought

Oxford Discover Grammar  Student Book 3 Answer Key  © Oxford University Press

13