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NỘI DUNG ÔN TẬP MÔN TIẾNG ANH LẦN 3 KHỐI 6 7 8 9

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<b>UNIT 6: THE ENVIRONMENT</b> <b>TEST 1</b>
<b>Choose the word or phrase ( A, B, C, D) that best completes the sentence </b>


1. The drivers have left lots of ____________ on the ground after their refreshment.


A- raw sewage B- cars C- garbage D- foam


2. Because plastic bags are very hard to ____________, they will cause pollution
A- tear B- wrap C- dissolve D- collect
3. I think we should use public buses instead of motorbikes to reduce _________.
A- exhaust fume B- sales C- buying D- pollute
4. Many people are worried about the pollution of the ____________.


A- traffic jam B- events C- situations D- environment
5. Put garbage bins around the schoolyard to prevent lazy students ______ throwing trash.
A- for B- from C- by D- with


6. I’m disappointed _________ people have spoiled this area.


A- when B- that C- if D- how


7. Crops are sprayed with________________ to kill insects.


A. fertilizer B. manure C. dung D. pesticide
8. Raw _______________ is pumped into the sea, from where it pollutes the beaches.


A. poison B. water C. sewage D. regulation


9. __________ may cause floods.


A. Pesticide B. Dynamite C. Wind D. Deforestation


10. Polluted water can directly do ___________ to people’s health and kill fish.


A. injure B. damage C. harm D. trouble


11. Mr. John is going to collect all the bags and take them to the ____________ dump.
A.garage B. garbage C. garden D. gas station
12. Use banana leaves to ___________food.


A. wrap B. wave c. rap D. close


13. You should clear ___________ all the trash on the ground before leaving.


A. on B. in C. for D. up


14. ___________ is chemical to kill insects.


A. Dynamite B. Garbage C. Pesticide D. Pollution
15. They pump raw sewage directly ___________ the sea.


A. from B. at C. in D. into


16. We had no food at home___________ we decided to go out for a meal.


A. so B. because C. if D. since


17. Miss Green kindly ________ a lunch for us.


A- gave B- provided C- presented D- offered
18. The ocean is polluted because raw ________ is pumped directly into the sea.



A-sewage B- material C- fume D- dump


19. A lot of countries are guilty ______ pumping raw sewage directly into the sea.


A-at B- of C- in D- for


20. The fields will be _____________ with plastics and tins.


A- littered B- thrown C- left D- put


<b>Use the correct form of the word given in each sentence </b>


1.My friend was ____________ pleased that she passed the exam. (extreme)
2. If the __________ goes on, what might happen? (pollute)


3. My friend was ____________ pleased that she passed the exam. (extreme)
4. Is he really ______________that you can’t come there? (disappoint)
5. People must learn about keeping the environment ____________. (pollute)
6. Mr Brown is talking to some volunteer _________________. (conservation)


7. We are talking about the preservation of ________________resources. (nature)
8. What should we do to reduce air _____________________? (pollute)


9. If we use much pesticide on vegetables, the vegetables will become _____________ and inedible. (poison)
10. Mrs Smith has _____________________ provided a picnic lunch for us. (kind)


11. People must learn about keeping the environment ____________. (pollute)
12. The baby laughed ___________ when her mother told her a funny story. (happy)
13. He is one of the most famous______________________in the world. (environment)
14. I want everyone to listen_______________________(care)



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<b>UNIT 6: THE ENVIRONMENT</b> <b>TEST 2</b>
<b>Choose the word or phrase ( A, B, C, D) that best completes the sentence </b>


21. You should clear _______ all the trash on the ground before leaving.


A- over B- up C- off D- up


22. I think people should use tree leaves for ___________ food.


A- wrapping B- rolling C- making D- recycling
23. Hurry up! Don’t walk so ____________. We’ll be late for school.


A. slow B. slowly C. heavy D. tired
24. I’m disappointed that people have ___________ this area.


A. burnt B. developed C. pumped D. spoiled
25. It’s time we did something to ____________ the air pollution.


A. reduce B. relieve C. increase D. reuse
26. When they leave the place, the ground is covered____________ trash.


A. of B. with C. for D. from


27. Tell him to bring his bicycle inside. If he ___________ it outside someone may steal it.
A. will leave B. leave C. leaves D. left


28. Mrs. Smith has kindly provided a picnic lunch ___________ us.


A. for B. with C. from D. of



29. In order to keep the school ground tidy and clean, put ___________ around the schoolyard.
A. garbage can B. garbage box C. garbage bins D. garbage cycle


30. Plastic bags are very hard ___________, they will cause pollution.
A. to go away B. to appear C. to disappear D. to dissolve
31. It is necessary _____________ forests.


A. protecting B. to protect C. protected D. protecting
32. If he ________ a student, he must wear school uniform.


A. was B. were C. is D. will be
33. I was very _________ that you won that first prize.


A. amazed B. amaze C. amazement D. amazing
34. Because plastic bags are very hard to ________, they will cause pollution.
A. dissolve B. wrap C. tear D. collect
35. Don’t throw trash ________the water.


A. to B. onto C. in D. at


36. I think the government should __________heavily anyone using dynamite to catch fish.
A. allow B. fine C. advise D. encourage


37 . Everyone must take part in _______________ deforestation.
A. preventing B. prevent C. prevented D. to prevent
38. It is necessary _____________ forests.


A. protecting B. to protect C. protected D. protect
39. If he ________ a student, he must wear school uniform.


A. was B. were C. is D. will be


40. We’ll make this beach clean and _____________ again.
A. beauty B. beautiful C. beautifully D. beautify
<b>Use the correct form of the word given in each sentence </b>


16. What should we do to keep the environment ______________? (pollute)
17. _______________trash will pollute the air. ( burn)


18. Air _______________is often seen as a major environmental result of modern living. (pollute)
19. I’m ______________that people have spoiled the area. ( disappoint)


20. _____________the environment unpolluted is very important. (keep)
21. Air and water ________ can make people fall ill. (pollute)


22. In order to keep our environment _________, we shouldn’t drop litter in public places. (pollute)
23. Don’t pump raw ____________ into seas and rivers or it will pollute them. (sew)


24. If we keep on polluting the air, more people will suffer from __________ diseases. (respire)
25. Ba was seriously ill right after eating those ____________ mushrooms.(poison)


26. Use public transport or we won’t _________ pollution. (minimum)


27. If ___________ continues, there will be no forest left ten years from now. (forest)
28. _____________ are interested in the protection of the environment. (conserve)
29. He is one of the most famous _________ in the world. (environment)


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<b>UNIT 7: SAVING ENERGY</b> <b>TEST 1</b>
<b> Choose the word or phrase that best fits the blank space in each sentence:</b>



1. They get a plumber ________________ sure there are no cracks in the pipes.


A. make B. makes C. made D. to make


2. Lighting accounts _________________ 10 percent to 15 percent of the electric bill.


A. of B. for C. from D. with


3. She’s working late next Friday _________________ she can’t come to the party.


A. because B. but C. so D. or


4. Don’t ________________ that box. We can use it again.


A. turn on B. turn off C. throw away D. go on


5. Many people still believe that _________________ resources will never be used up.
A. nature B. natural C. naturally D. unnaturally


6. –“Has an announcement been made about the eight o’clock flight to Paris?” –“______________.”
A. Not yet B. Yes, it was C. I don’t think that D. Sorry, I don’t


7. I want to see the __________________ of environment from the local authority.
A. protect B. protected C. protecting D. protection
8. Scientists are looking for an ________________ way to reduce energy consumption.
A. effect B. effected C. effective D. effectively
9. You should take __________________ your shoes when you go into the temple.


A. in B. on C. off D. of



10. If you want to save money, you should _______ the amount of water your family uses.


A. increase B. reduce C. repair D. cause


11. Get the plumbers to make sure there are no cracks in the __________________.
A. faucets B. pipes C. showers D. tubs


12. Don’t ______________________trash onto the water.


A. burn B. reduce C. litter D. throw


13. There’s always litter here. No one ever________________________.
A. picks up it B. picks it up C. picks up D. picks it
14. We played very well. ____________________, we lost the match.


A. Therefore B. However C. Moreover D. Consequently
15. The latest ___________________in saving energy is compact bulb.


A. modernization B. advance C. innovation D. information
16. Crops are sprayed with________________ to kill insects.


A. fertilizer B. manure C. dung D. pesticide
17. If we pollute the water, we __________________ no fresh water to use.


A. have B. has C. will have D. should have


18. - “Let’s do something interesting this evening!”
- “__________________________”


A. Don’t mention it. B. OK, why not? C. What about doing? D. You’re welcome.


19. Everyone must take part in ______________________deforestation.


A. protecting B. persuading C. preventing D. permitting
20. Polluted water can directly do harm _______________people’s health.
A. in B. on C. at D. to
<b>Use the correct form of the word given in each sentence:</b>


1. In the future, many buildings will be ________________ by solar energy. (hot)
2. We want to buy _________________ that will save money. (produce)


3. The price of __________________ has gone up again. (electric)


4. If it doesn’t rain soon, there’ll be a great __________________ of water. (short)


5. There is so much smoke in the air that it is __ to live in many of the world’s cities. (health)
6. We should use the world’s energy resources ________________. (economy)


7. Food is a ______________________ of life. (need)


8. There are a lot of technological ________ designed to save energy. (innovate)
9. We find advertising on television very ____________________ . (effect)
10. I switched the light off to save ____________________ . (electric)


11. Energy___________________ includes searching for alternative fuels. (conserve)
12. Energy-saving bulbs help ________________ save money. (consume)


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<b>UNIT 7: SAVING ENERGY</b> <b>TEST 2</b>
<b> Choose the word or phrase that best fits the blank space in each sentence:</b>


1. She turned on the __________________and washed her hand carefully.



A. rule B. faucet C. topic D. draft


2. A clean, safe form of energy which comes from the sun is_________ .


A. fossil fuel B. panels C. solar energy D. nuclear power
3. The air polluted ____________the factories produce a lot of smoke.


A. and B. so C. since D. but
4. Remember _________________the lights before leaving the room


A. turning off B. turns C. to turn off D. turn on


5. For most North American households, lighting _____________ 10 percent to 15 percent of the electricity
bill.


A. explains to B. says to C. accounts for D. tells to
6. Get the plumbers to make sure there are no cracks in the __________________________.


A. faucets B. pipes C. showers D. tubs


7. He takes part in the charity organization __________________he has no much free time.


A. because B. although C. since D. so


8. Shall we travel by public transport? B: ________________________________.


A. Yes, let’s B. Well done C. It’s great D. Thanks a lot
9. Mrs Ha got a plumber _______________________the water pipes yesterday.



A. check B. to check C. checking D. checked


10. _____________believe that we should preserve the tropical rainforests in the world.
A. Conservationists B. Plumbers C. Consumers D. Aliens


11. If we _______________wasting water, there will be a shortage of fresh water in a few decades.


A. look for B. go on C. turn on D. switch off


12. It’s the weather forecast on TV . Can you turn _____ the volume ?


A. at B. up C. out D. between
13. We often take part in charity activities _____________ by the churches.


A. organizing B. organized C. are organized D. are organizing
14. If we pollute the water, we ___________ no fresh water to use.


A. have B. has C. will have D. should have


15. In order to save electricity, you should replace ordinary bulbs with ___________ bulbs.


A. energy-saving B. saving-energy C. energy-saved D. saved-energy
16. We should not _____________ in public places.


A. read B. litter C. smile D. move


17. A(n) ____________ amount of money has been wasted on this project.


A. enormous B. very large C. very important D. A and B
18. “Let’s do something interesting this evening!” “________ “.



A. Don’t mention it B. OK, why not C. What about doing? D. You’re welcome


19. We can protect our environment and save a lot of money by buying _______________ products.


A. used B. recycled C. waste D. recycling


20. Polluted water can directly do harm ________people’s health.


A. in B. on C. at D. to
<b>Use the correct form of the word given in each sentence:</b>


1. There have been many _____________________ in the field of electrical engineering. (innovate)
2. The river is so __________________________that we can’t swim. (pollution)


3. I look forward to ____________________________from you. (hear)


4. Use public transport, or we won't ______________________________ pollution. (minimum)
5. He is ______________________________ by his failure. (appoint)


6. Smoking can __________________________ damage your health. ( serious)
7. Saving energy is ________________________________ to all of us. (profit)


8. If we go on wasting water, there will be a ____________________________ of fresh water. (short)
9. I’m _________________________about my final exam.(worry)


10. Mr Brown is talking to some volunteer ______________________. (conserve)


11. Since the world’s energy resources are limited, we must _________ them. (conservation)
12. He is one of the most famous __________________ in the world. (environment)



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<b>UNIT 8: CELEBRATIONS</b> <b>TEST 1</b>
<b>MULTIPLE CHOICES</b>


1. Congratulation! You win the first prize. -____________________________
A. Well done. B. That’s right. C. Thanks so much D. Why!


2. It’s the weather forecast on TV . Can you turn ___________________ the volume ?
A. at B. up C. out D. between


3. Easter is a joyful festival _______________comes in early spring.


A. which B. that is C. where D. when


4. Anna Javis was the woman ____________first thought of Mother’s Day.


A. that B. who she C. she D. whose


5. The teacher is giving his students advice ________________ how to write a good essay.


A. on B. in C. about D. from


6. Passover, A Jewish festival, __________________ freedom from slavery.
A. is celebrated B. celebrate C. celebrates D. celebrating
7. Mid – Fall Festival is a _________ festival for children.


A. joy B. joyful C. joyless D. joyfully
8. We think Mother’s Day should be celebrated _________ .


A. nation B. national C. nationality D. nationwide



9. Whales and dolphins both make sounds ____________in some ways are similar to a language.
A. which B. by which C. who D. whom


10. My grandmother, _________ an intelligent woman, has greatly influenced my life.
A. who B. that C. who is D. that is


11. _________ Easter, many children and adults enjoy painting eggs.


A. On B. At C. During D. In


12. - A: “Happy Birthday! This is for you.” - B: “ ___________________”


A. Oh, thank so much B. Oh, thank you so much C. That’s kind to me D. I am glad you like it.
11. Tet is a time for families to clean and _________ their homes.


A. cover B. decorate C. install D. conserve
12. People __________ live in glass houses shouldn’t throw stones


A. whose B. who C. whom D. which


13. Passover is a (an) __________spring festival of Jewish.


A. modern B. new C. ancient D. disappointed


14. In my opinion, it’s _______ to have a day to celebrate for Mom and another day for Dad.
A. proud B. worried C. nervous D. necessary


15. People eat a special meal called __________at Passover.



A. Seder B. chocolate C. turkey D. pancake


<b>WORD FORMS</b>


<b>1.</b> _________________of her work is improving. (Efficient)


<b>2.</b> There are many people _______________ sticky rice cakes at the Town Hall. ( make )


<b>3.</b> Try not to add more ________________ into the environment, we will live healthier. ( pollute )
<b>4.</b> The students participated in the festival _____________________. (joy)


<b>5.</b> She has been ________________________as the president of our company. (nominate)
<b>6.</b> There are many ______________________ throughout the year (celebrate)


<b>7.</b> He wants to ___________________________ his room. (decoration)


<b>8.</b> In spite of being poor, the lady often behaves to everyone ________________( generous)
<b>9.</b> Let me ______________you on being awarded scholarship. . ( congratulation)


<b>10.</b>It’s ____________________that people have spoiled the beach. (disappoint)


<b>11.</b>The man living in my neighborhood gave the charity _____________money. (consider)
<b>12.</b>Passover is _______________________ in Israel and by all Jewish people. (celebration)
<b>13.</b>These kinds of food are ___________ available in supermarket. (free)


<b>14.</b>The campaign against air pollution was organized by a famous environment _____________. (act)
<b>15.</b>_____________________, people eat sticky rice cakes at Tet. ( tradition)


<b>16.</b>She has been ____________ as the president of our company. (nominate)
<b>17.</b>She cried with ____________ when she heard the news. (joy)


<b>18.</b>We often go to the town ___________ house. (culture)


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<b>UNIT 8: CELEBRATIONS</b> <b>TEST 2</b>
<b>MULTIPLE CHOICES</b>


1. My parents always tell me not to _____________heart.


A. loose B. lose C. lost D. losing


2. Ms. Hoa is always loved as she is extremely kind and__________________________.
A. selfish B. cruel C. foolish D. generous
3. Was the movie “Star Wars” _________ for an Oscar?


A. recognized B. nominated C. accepted D. taken
4. Let me __________ you on your nomination.


A. give B. advise C. nominate D. congratulate
5. ________________ he likes chocolate, he tried not to eat it.


A. Because B. Since C. Despite D. Though


6. You gave me a ____________, and the feeling that you never wanted to let me go.


A. gifts B. sense C. hug D. necessity


7. Passover is celebrated in Israel and by all _____________ people.


A. English B. Vietnamese C. Jewish D. Japanese
8.- Tet is a festival which gives us a chance to have family ______________.



A. congratulations B. reunions C. relatives D. disappointments
9. Jewish people celebrate _________ from slavery at Passover.


A. happiness B. life C. freedom D. survival


10. On Easter Sunday, people ___________________ the streets to watch colorful parades.


A. crowd B. occur C. behave D. stand


11. Ba ate a lot of food ____________________he wasn’t hungry.


A. but B. or C. though D. despite


12. She feels ______________________with her bad result.


A. satisfy B. satisfactory C. satisfied D. unsatisfied


13. On Easter Day, people crowed the streets to watch colorful ______________ .
A. picnics B. parades C. contests D. shows


14. What would you like for drinks, Pepsi __________ 7 Up?


A. and B. so C. though D. or


15. The sun,____________ is one of millions of stars in the universe, provides us with heat and light.


A. who B. which C. that D. where


16. His sense of humor _________ him from the other students.



A. describe B. describes C. distinguish D. distinguishes
17. Mid – Fall Festival is a _________ festival for children.


A. joy B. joyful C. joyless D. joyfully
18. We think Mother’s Day should be celebrated _________ .


A. nation B. national C. nationality D. nationwide


19. Whales and dolphins both make sounds_______in some ways are similar to a language.
A. which B. by which C. who D. whom


20. My grandmother, _________ an intelligent woman, has greatly influenced my life.
A. who B. that C. who is D. that is


<b>Use the correct form of the word in parentheses :</b>


1. They _________ my son on graduating from university yesterday. ( congratulation )
2. I’m very _________ of my father and love him so much. ( pride )
3. Sometimes I have some _________ which can’t be explained. ( feel )
4. Jason is spending his money _________ because he is on vacation. ( free )
5. "Well done. I’m _________ with your study." "Thanks, Dad." ( satisfy )
6. I’d like to help you but _________ there’s nothing I can do. ( fortunate )


7. The topic they are discussing is _________, so some of them have fallen asleep. (interest)
8. New Year’s Day is a national _________, so people don’t have to go to work. (festive)
9. She has been ____________ as the president of our company. (nominate)


10. She cried with ____________ when she heard the news. (joy)
11. We often go to the town ___________ house. (culture)



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<b>UNIT 9: NATURAL DISASTERS</b> <b>TEST 1</b>
<b>MULTIPLE CHOICES</b>


1. Areas around Hanoi can _____________________ clouds during the day.


A-hope B-expect C-wish D- consider


2. The earthquake caused ______________________damage to the old city .
A- extend B- extended C- extensive D- extension


3. A tornado looks like a big , dark __________________coming from the bottom of a storm cloud .


A- funnel B- bowl C- cloud D- mushroom


4. The last tsunami caused a lot of ___________________to the countries along the Pacific coast .
A- eruption B- disasters C- destruction D- damage


5. It’s also going to rain ___________________ there in the evening .
A- thickly B- strongly C- heavily D- thinly
6. I’d like a box of _____________________________in order to make a fire.
A- matches B- chocolates C- water D- cigarette
7. According to the weather _______________________, it will be raining tonight.
A- prediction B- informationC- announcement D- forecast


8. There may be a _______________________cut so we should buy candles.


A- energy B- power C- resources D- bulb


9. Thousands of people died, and hundreds were injured ______________scientists had warned them about the
eruption.



A- although B- when C- before D- because


10. A lot of trees _________________________ when the storm hit the city last year.


A. blew down B. were blown down C. have been blown down D. are blown down
11. We should buy a ladder _________________________ we need to fix the roof.


A. although B. however C. besides D. in case
12. Thousands of people were made _________________ after the storm.


A. disastrous B. homeless C. perfect D. experienced
13. We must find a shelter now, because of the ______ storm.


A. strong B. long C. heavy D. boring
14. In 1995 a huge earthquake ______ the city of Kobe in Jape


A. struck B. striking C. striked D. strike
15. He warned me of the ______ in the forest.


A. dangers B. dangerousness C. dangerously D. dangerous
16. Pompeii was completely ______ in AD 79 by an eruption Mount Vesuvius.
A. destroyed B. destroy C. to destroy D. destroying
17. Many people become ______ because of the natural disasters every year,
A. homeless B. homesick C. homeland D. homework
18. Mount Pinatubo, ______ is a volcano erupted in 1991.


A. which B. who C. whom D. that
19. Tornadoes and funnel-shaped storms can suck up ______ is in their path.
A. that B. whom C. who D. whose


20. Turn the radio _____________________. It’s too loud.


A. down B. up C. on D. off


<b>WORD FORMS</b>


1. The __________ of earthquakes in the world occur a round the “Ring of Fire”. (major)
2. The eruption of Pinatubo was world’s largest ____________ one. (volcano)


3. He is one of the best _________ in the world. (science)
4. The wind has __________ changed the direction. (abrupt)


5. Nowadays, ____________ can know when a volcano will erupt. (science)
6. he is one of the best _______________ in the world. (science)


7. All of sudden, the dog began behaving _______________ (strange)


8. Many people became _________ because their houses disappeared after the terrible storm. (home)
9. Pompeii was __________ destroyed in A.D 79 by an eruption of Mount Vesuvius. (complete)
10. Tidal waves are the result of an abrupt shift in the underwater ______ of the Earth. (move)


11. Many people become ____________ because of the natural disaters every year. (home)


12. The most _________________earthquake in Japanese history damaged Tokyo and Yokohama and killed
150,000 people. (disaster)


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<b>UNIT 9: NATURAL DISASTERS</b> <b>TEST 2</b>
<b>MULTIPLE CHOICES</b>


1. ________are funnel-shaped storms passing overland below a thunderstorm.


A. Earthquakes B. Tropical storms C. Hurricanes D. Tornadoes


2. In 1995 , a huge earthquake struck Kobe city in Japan and caused severe _______.
A. damage B. destruction C. shift D. collapse


3. The earthquake _______ the city at 2 this morning


A. occurred B. hit C. swept D. measured


4. Thousands of people were saved because scientists had ______them about the volcanic eruption.


A. said B. spoke C. warned D. talked


5. A tropical storm which reaches 120 kilometers an hour is called a _______ in North and South America.
A. typhoon B. cyclone C. hurricane D. tornado


6. Ninety percent of earthquakes occur _______ the Pacific Rim.


A. around B. at C. in D. about


7. The roof ________ under the weight of snow last night.


A. collapsed B. fell C. dropped D. flew


8. A tornado looks like a big, dark _______ coming from the bottom of a storm cloud.


A. funnel B. bowl C. mushroom D. cloud


9. What do you think about American films ? - ____________________.



A. Yes I do B. No I don’t C. I think of them very much D. I like them
10. I’m sorry I was stuck in a traffic jam - ___________________.


A. Never mind B. Don’t apologize C. OK, we’ve just started D. My pleasure
16. Last night a heavy storm _________________________a coastal city in the country.


A. hit B. strike C. predicted D. collapsed


17. Thunder kept me ________________________sleeping well last night.


A. from B. for C. off D. over


18. Scientists had warned people about the ________________________ of Mount Pinatubo in 1991.
A. eruption B. destruction C. movement D. damage


19. Although Tom’s grandmother doesn’t ________ weather forecasts, she likes watching them.
A. experience B. trust C. expect D. predict


20. A tropical storm which reaches 120 kilometers an hour is called a _______ in North and South America.
A. typhoon B. cyclone C. hurricane D. tornado


<b>WORD FORMS</b>


1. Thousands of people were ______________________killed in that morning . (disaster)
2. This is one of the most terrible ____________________I have ever seen. (disastrous)
3. Remember to buy some ___________________ food in case there is a sudden storm. (can)
4. People are doing hard for ________________________ research. (science)


5. Wastes from factories are ___________________the environment. (damage)
6. Nowadays, people are _______________________the forests seriously. (destroy)


7. We expected the trip would be _________________________, but it wasn't. (excite)
8. He is a _____________________. I saw him on TV last night. (weather)


9. The streets are filled with a__________ atmosphere when Christmas Day comes (joy)
10. Many _______________activities take place in different places of Vietnam at Tet. (culture)


11. He is very ________towards his friends – he always tries to help if one of them has a problem. (consider)
12. It was the largest volcanic ______________________in the world. (erupt)


13. The wind has _________________________changed the direction . (abrupt)
11. This is one of the most terrible _______________ I have ever seen. (disastrous)
12. Remember to buy some ______________food in case there is a sudden storm. (can)
13. People are doing hard for _______________ research. (science)


14. Wastes from factories are __________________the environment. (damage)
15. Nowadays, people are ________________the forests seriously. (destroy)


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