đề thi thử tiếng anh đại học quốc gia có lời giải chi tiết

TEST A1-14-285
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Question 1: The theory of relativity ______ by Einstein, who was a famous physicist.
A. was developed B. is developed C. develops D. developed
Question 2: ______ a few more minutes, we could have finished the task.
A. Unless we had B. If we had had C. If we have D. If we had
Question 3: Communities(cộng đồng) in remote (xa)areas(khu vực)are extremely (vô cùng)_____ to famine (nạn đói) if
crops(vụ mùa) fail(thất bại).
A. defenseless B. helpless C. disappointed D. vulnerable
Kh bảo vệ kh thể giúp đỡ thất vọng dễ lâm vào
Question 4: The girl was used ______ birthday presents from her brothers.
A. to receive B. to receiving C. to being received D. to be receiving
Question 5: I could hear voices but I couldn’t ______ what they were saying.
A. turn up (đến) B. bring about (gây ra) C. make out (hiểu) D. try out (thử)
Question 6: ______ was the tea that we couldn’t drink it.
A. No longer B. So strong C. Hardly ever D. How strong
Question 7: Do you remember ______ to help us when we were in difficulty?
A. once offering B. to offer C. being offered D. you offer
Question 8: We could have caught(đáng lẽ đã có thể bắt kipf) the last train, but we ______ five minutes late.
A. were B. have been C. would be D. are
Question 9: ______ always gives me real pleasure.
A. I arrange flowers B. The flowers are arranged
C. While arranging flowers D. Arranging flowers
Question 10: In our team, no person ______ John could finish this tough task in such a short time.
A. other than B. including C. outside D. rather than
A. other than= except for(ngoại trừ) . B. including (bao gồm) C. outside (bên ngoài) D. rather than (= hơn là)
Dịch: Trong đội của chúng tôi, không ai ngoài John có thể hoàn thành công việc khó khăn này trong khoảng thời gian ngắn
như vậy.
Question 11: Tom hasn't completed the work yet and Maria hasn't ______.
A. also B. either C. neither D. too
Question 12: Kay: “I wouldn’t do that if I were you.” John: “______”

A. Wouldn’t you? Why? B. Would you, really? C. I’d rather you didn’t. D. It’s out of the question.
Question 13: In my apartment there are two rooms, ______ is used as the living-room.
A. the large one B. the largest one C. the largest of which D. the larger of which
Question 14: We received a call from the teacher ______ charge of our course.
A. to B. in C. at D. on
. "in charge of"= responsible for= chịu trách nhiệm về cái gì.
Question 15: The superstar(siêu sao), accompanied (hộ tống)by the other members of the band, ______ to visit our school
next week.
A. has had B. are C. is going D. are going
Question 16: We hoped ______ they would come and give us new lectures.
A. when B. that C. which D. what
Question 17: Mrs. Chau has managed the department ______ that she’ll be promoted next month.
A. too successful B. so successfully C. very successful D. too successfully
Question 18: ______ he got top marks at high school, he never went to university.
A. Despite B. Although C. Meanwhile (trong lúc đó) D. Nevertheless
Question 19: Sammy had worked in England for a year ______ moving to Scotland.
A. until B. once C. while D. before
Question 20: Lucy: “You look really nice in that red sweater!” Sue: “______”
A. Don’t mention it. B. How dare you? C. I’m afraid so. D. Thank you.
Question 21: Applications(đơn xin) _____ in after 30th April will not be considered.
A. sent B. that is sent C. which sent D. send
Question 22: Mary: “The hat’s so beautiful. Thanks." Tony: “________”
A. Lucky you! B. Great idea! C. The same to you! D. I’m glad you like it.
Question 23: “It’s about time(đã đến lúc) you ______ your homework, Mary.”
A. must do B. did C. do D. will do
Question 24: The higher the content of carbon dioxide in the air is, ______.
A. the more heat it retains B. the heat it retains more
C. it retains the more heat D. more heat it retains
Question 25: Be sure not to rely too ______ on your mother tongue (tiếng mẹ đẻ) when you are learning a foreign language.
A. numerously B. heavily C. severely D. abundantly

Đông đảo nhiều, nặng khắt khe nhiều (số lượng)
H ãy đảm bảo rằng không phụ thuộc quá nhiều vào tiếng mẹ đẻ khi bạn học ngoại ngữ.
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A1- tờ 22
CLOSEST :
Question 36: They arrived too late to get good seats. (Họ đến quá trễ đến nỗi kh có chỗ ngồi tốt)
A. They had to stand for the whole show.
B. Although they were late, they found some good seats.
C. They got good seats some time after they arrived.
D. As they got there too late, there were no good seats left.
Question 37: John said, “You’d better not lend them any money, Daisy.”
A. John asked Daisy if she had lent them any money.
B. John commanded Daisy not to lend them any money.
C. John advised Daisy not to lend them any money.
D. John ordered Daisy not to lend them any money.
Question 38: I had two job offers upon graduation(tốt nghiệp), neither of which(cả 2 đề kh) was appropriate (phù hợp) for my
qualifications(trình độ).
A. Both of the job offers I had prior to my graduation were appropriate for my qualifications.
B. I was offered two jobs soon after my graduation, both of which were suitable for my qualifications.
C. The two jobs offered to me after my graduation didn’t suit my qualifications.
D. Though I wasn't qualified enough, two jobs were offered to me upon graduation.
Question 39: This village is inaccessible(kyh tới được) in winter due to (bởi vì)heavy snow.
A. Heavy snow makes it impossible to reach the village in winter.
B. We have no difficulty reaching this village in winter because of heavy snow.
C. Nobody likes to come to this village in winter because of heavy snow.
D. We cannot gain permission to this village in winter because of heavy snow.
Question 40: "Get out of my car or I'll call the police!" Jane shouted to the strange man.
A. Jane politely told the man she would call the police if he didn’t leave her car.
B. Jane plainly said that she would call the police.
C. Jane threatened to call the police if the man didn’t leave her car.

D. Jane informed the strange man that she would call the police.
Question 41: When there is so much traffic on the roads, it is sometimes quicker to walk than to go by car.
A. During rush hours(giờ cao điểm), walking gives me much more pleasure than driving in the heavy traffic.
B. It is faster to walk than to drive in the heavy traffic at certain time of the day.
C. The traffic is always so heavy that you’d better walk to work; it’s quicker.
D. There is so much traffic these days that it is more pleasant to walk than to drive.
Question 42: It was only when(chỉ khi) I left home that I realized how much my family meant to me.
A. As soon as(ngay sau khi) I left home, I found out what a family could do without.
B. I left home and didn’t realize how meaningful (có ý nghĩa()y family was.
C. Not until I left home did I realize how much my family meant to me.
D. Before I left home, I realized how much my family meant to me.
Question 43: I forgot to lock the door before leaving.
A. I didn’t remember whether I locked the door before leaving.
B. I remembered that I left the door locked before going out.
C. I locked the door before leaving, but I forgot about it.
D. I left without remembering to lock the door.
Question 44: It’s difficult for me to understand what he implies.
A. I find it difficult to understand what he really means.
B. To understand what he really means is difficult to find.
C. Understanding what he implies is found difficult.
D. What he implies is not very difficult to understand.
Question 45: There is no question of changing my mind about resigning(từ chức).
A. Nobody knows about my decision on resigning.
B. I certainly won’t change my mind about resigning.
C. They asked me no question about resigning.
D. I should have changed my mind about resigning.
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of
the following questions.
Question 46: Our astronauts chosen for fly spacecraft were selected from military test pilots.
A B C D

Question 47: After our discussion, we decided to take a later flight and so that we could spend more time with the clients.
A B C D
Question 48: These exercises look easy, but they are very relatively difficult for us.
A B C D
Question 49: As the old one, this new copier can perform its functions in half the time.
A B C D
Question 50: The assumption that smoking has bad effects on our health have been proved.
A B C D
CLOSEST :
Question 51: Now many people who shop at a health food store instead of a local supermarket are much more likely to find a
healthy, sugar-free beverage (thức ăn kh đường).
A. full of preservatives B. harmful to health C. convenient to prepare D. beneficial to health
Bảo tồn hại cho sk thuận tiện cho việc chuẩn bị có lợi
Question 52: Even though the mountain was very steep and the climb was hazardous(mạo hiểm), several adventurous
tourists managed to reach the top.
A. causing a lot of risks B. bringing excitement C. resulting in depression D. costing a lot of money
Question 53: Dozens of applicants showed up for the vacant position, but only a handful of them were shortlisted for the
interview.
A. class B. hand C. small number D. small amount
Question 54: Just like hearing infants who start first with simple syllable babbling, then put more syllables together to sound
like real sentences and questions, deaf babies follow the same pattern.
A. able to hear B. physically abnormal C. obedient to parents D. hard of hearing
Question 55: Thanks to the invention of the microscope, biologists can now gain insights into the nature of the human cell.
A. far-sighted views B. spectacular sightings C. deep understanding D. in-depth studies
Stress:
Question 56: A. observant B. decisive C. popular D. impatient
Question 57: A. reliable B. conventional C. preservative D. intellectual
Question 58: A. customer B. energy C. computer D. property
Question 59: A. struggle B. survive C. enlarge D. occur
Question 60: A. technology B. environment C. predominance D. superstition

Gap-fill:
Why is it that many teenagers have the energy to play computer games until late at night but can't find the energy to
get out of bed (61)_______ for school? According to a new report, today's generation of children are in danger of getting so
(62)________ sleep that they are putting their mental and physical health at (63)________. Adults can easily survive on
seven to eight hours' sleep a night, (64)________ teenagers require nine or ten hours. According to medical experts, one in
five youngsters (65)_________ anything between two and five hours' sleep a night less than their parents did at their age.
This (66)_________ serious questions about whether lack of sleep is affecting children's ability to concentrate at
school. The connection between sleep deprivation and lapses in memory, impaired reaction time and poor concentration is
well (67)_________. Research has shown that losing as little as half an hour's sleep a night can have profound effects
(68)________ how children perform the next day. A good night's sleep is also crucial for teenagers because it is while they
are asleep (69)________ they release a hormone that is essential for their 'growth spurt' (the period during teenage years
when the body grows at a rapid rate). It's true that they can, to some (70)________, catch up on sleep at weekends, but that
won't help them when they are dropping off to sleep in class on a Friday afternoon.
By Tim Falla and Paul A. Davies. Solutions Advanced. OUP
Question 61: A. behind time B. about time C. in time D. at time
Question 62: A. few B. less C. much D. little
Question 63: A. jeopardy B. threat C. risk D. danger
Question 64: A. or B. because C. whereas D. so
Question 65: A. puts B. gets C. brings D. makes
Question 66: A. raises B. rises C. results D. comes
Question 67: A. organized B. arranged C. established D. acquired
Question 68: A. in B. on C. to D. at
Question 69: A. at which B. which C. where D. that
Question 70: A. rate B. extent C. level D. point

TEST D1-14-852
OPPOSITE :
Question 1: We run a very tight ship here, and we expect all our employees to be at their desks by eight o'clock and take
good care of their own business.

A. organize things inefficiently B. manage an inflexible system
C. run faster than others D. have a good voyage
Question 2: Any student who neglects his or her homework is unlikely to do well at school.
A. approves of B. attends to C. puts off D. looks for
CLOSEST :
Question 13: The early failure of the Spanish squad in the 2014 World Cup deeply disappointed their fans.
A. That their squad left the 2014 World Cup so early was very disappointing for the Spanish sportsmen.
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B. Living up to their fans’ expectation, the Spanish squad left the 2014 World Cup so early.
C. The Spanish squad was terribly disappointed that their fans had to leave the 2014 World Cup so early.
D. To the disappointment of their fans, the Spanish squad had to leave the 2014 World Cup too early.
Question 14: The president placed his car at my disposal as a bonus for my good work.
A. In order to praise me as a good worker, the president took me home in his own car.
B. To get rid of the car, the president decided to sell it to me, his good worker, at a bonus price.
C. To show his appreciation for my good work, the president allowed me to use his car whenever I liked.
D. I was willing to drive the president’s car as a compliment for my good performance at work.
Question 15: “Send this urgent document immediately!” the officer told the soldier.
A. The officer requested that the soldier rush out due to the document’s urgency.
B. The officer ordered the soldier to deliver the urgent document instantly.
C. The officer recommended the soldier leave right away because of the urgent document.
D. The officer advised the soldier to send the urgent document right away.
Question 16: “Believe me. It’s no use reading that book,” Janet told her boyfriend.
A. Janet tried to convince her boyfriend that the book was not worth reading.
B. Janet managed to persuade her boyfriend that reading the book was worthwhile.
C. Janet opposed her boyfriend’s idea that reading the book was not useful.
D. Janet suggested to her boyfriend that reading the book was useful.
Question 17: “Why don't you join us for our next class reunion?” Mary said to me.
A. Mary cordially invited me to join them for the next class reunion.
B. Mary insisted on my joining them for the next class reunion.
C. Mary advised me not to join them for the next class reunion.

D. Mary strongly urged me to join them for the next class reunion.
stress
Question 18: A. commit B. index C. preview D. open
Question 19: A. enrichment B. advantage C. sovereignty D. edition
Question 20: A. habitat B. candidate C. wilderness D. attendance
Question 21: A. economic B. considerate C. continental D. territorial
Question 22: A. interact B. specify C. illustrate D. fertilize
Question 23: All of the students in this course will be assessed according to their attendance, performance,
A B C
and they work hard.
D
Question 24: As seeing from the mountain top, the area looks like a picturesque harbour town.
A B C D
Question 25: Women in many parts of the world have had lower status than men, which the extent
A B
of the gap between genders varies across cultures and times.
C D
Question 26: Since January this year, Joe has suffered two injuries, one to his ankle and the other in New York.
A B C D
Question 27: Most of the students are queuing in lines waiting to enter the classroom.
A B C D
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines the
pair of sentences given in each of the following questions.
Question 28: Nam defeated the former champion in three sets. He finally won the inter-school table tennis championship.
A. Having defeated the former champion in the inter-school table tennis, Nam did not hold the title of champion.
B. Although Nam defeated the former champion in three sets, he did not win the title of inter-school table
tennis champion.
C. Having defeated the former champion in three sets, Nam won the inter-school table tennis championship.
D. Being defeated by the former champion, Nam lost the chance to play the final game of inter-school table
tennis championship.

Question 29: Most scientists know him well. However, very few ordinary people have heard of him.
A. He is the only scientist that is not known to the general public.
B. Not only scientists but also the general public know him as a big name.
C. Although he is well known to scientists, he is little known to the general public.
D. Many ordinary people know him better than most scientists do.
Question 30: I do my homework and schoolwork in separate books. I don't get muddled up.
A. Having two separate books at home and at work helps me avoid getting muddled up.
B. I do my homework and schoolwork in separate books so that I don't get muddled up.
C. I do not get muddled up due to the separation between homework and schoolwork.
D. I would get muddled up if I did not separate homework from schoolwork.
Question 31: She looked through the hotel advertisements. She stopped only when taking a fancy to one piece.
A. She found the hotel advertisements so interesting that she could hardly turn away from them.
B. She stopped looking through the hotel advertisements only when she had found another piece.
C. She stopped reading the hotel advertisements only when one of them caught her fancy.
D. She took so great a fancy to the hotel advertisements that she could not stop reading them.
Question 32: She wrote the text. She selected the illustration as well.
A. She not only wrote the text but also selected the illustration.
B. The text she wrote was not as good as the illustration she selected.
C. In order to select the illustration, she had to write the text.
D. If she had written the text, she would have selected the illustration.
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase
that best fits each of the numbered blanks from 33 to 42.
Postsecondary institutions and private schools are corporations under U.S. law. They are approved to operate as
non-profit, for-profit, or public corporations (33)______ education and training. Increasingly, state authorities are requiring
approved educational providers to apply (34)______ and receive accreditation as a condition of final and continued approval.
As corporate entities, U.S. institutions are internally self-governing and are (35)______ to make property, facilities,
equipment, and utilities transactions; make their own personnel decisions; decide whom to admit to study and to graduate;
(36)______ their own funds from outside sources; enter into contracts and compete for grants; and do most of the other
things that corporations do. Institutions compete (37)______ one another for students, research funding, faculty, and other
benefits. Public institutions may compete within the same state or territory for budget appropriations. It is the corporate

nature of institutions and the competition within the system that (38)_____ Americans to refer to the concept of the
educational or academic marketplace - an important distinctive element of the way U.S. education is organized.
Some institutions are governed (39)______ under multi-campus arrangements. These include most local public
schools (governed by school districts) and many state community college and university systems. Whether single- or multi-
campus, institutional corporations (40)______ by boards of citizens, both alumni and non-alumni, who are ultimately
responsible for all operations. They appoint senior (41)______, such as principals, headmasters, presidents, and deans; and
approve the actions taken (42)______ their name.
From A Diverse Educational System: Structure, standards, and challenges. InfoUSA (CD version)
Question 33: A. provided B. provision C. provide D. providing
Question 34: A. to B. with C. for D. on
Question 35: A. capable B. probable C. possible D. able
Question 36: A. call B. rise C. lend D. raise
Question 37: A. at B. for C. to D. with
Question 38: A. makes B. prevents C. lets D. causes
Question 39: A. collection B. collect C. collectively D. collective
Question 40: A. being controlled B. controlled C. are controlling D. are controlled
Question 41: A. leaders B. trainees C. judges D. assistants
Question 42: A. above B. on C. in D. at
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Question 43: In no circumstances ______ on campus.
A. smoking should be allowed B. should allow smoking
C. we should allow smoking D. should smoking be allowed
Question 44: In the last match, Sabella changed his formation at half-time, introducing Fernando Gago in midfield and
Higuain in attack, but in the end it was Messi’s magic that ______ the difference.
A. did B. made C. took D. gave
Question 45: “My secretary will book you an afternoon flight and have you ______ at the airport.”
A. to pick up B. picked up C. pick up D. picking up
Question 46: Visitors to the local museum are mostly attracted by ______ rocking chair.
A. a wooden old beautiful European B. a beautiful old European wooden
C. an old beautiful wooden European D. an old wooden European beautiful

Question 47: The young lady sat still in the afternoon breeze, with her hair ______ her back.
A. fallen against B. running over C. flowed down D. streaming down
Question 48: We need to talk more about ______ for the summer vacation before July.
A. why to choose B. when to use C. how to make D. where to go
Question 49: ______ my mother’s encouragement, I wouldn’t have made such a daring decision.
A. Until B. In spite C. But for D. Providing
Question 50: Minh, a student from Hai Phong, is going to take the college entrance exam in Hanoi next week. His father is
seeing him off at the railway station. Select the most suitable response to fill in the blank.
Dad: “Good luck with the exam, Minh!”
Minh: “______, Dad.”
A. By no means B. I wish so C. Thank you D. Never mind
Question 51: The carefully nurtured gardens with a wide ______ of flowers and fruit trees have added elegance to this place
and made it a major tourist attraction.
A. amount B. number C. species D. variety
Question 52: ______, she continued to carry out her duties.
A. No matter how poor her health B. Despite her good health
C. Although in poor health D. Although she is in good health
Question 53: China’s placement of its oil rig in Vietnam’s East Sea EEZ has been denounced by ASEAN and Western
politicians and professionals as the violation of Vietnam’s ______ waters.
A. inland B. farmed C. territorial D. fresh
Question 54: The bank has more than 100 branches, ______ in a major urban area.
A. each located B. each locating C. and are located D. the location of which
Question 55: In my opinion, ______ new technology who will finally decide which ideas take off.
A. it is the user of B. that the development of
C. that the user of D. it is the development of
Question 56: While I was looking through my old albums the other day, I ______ this photograph of my parents' wedding.
A. turned down B. came across C. made up D. took after
Question 57: Carbon dioxide ______ as one of the main contributors to the greenhouse effect.
A. had identified B. had been identified C. has been identified D. has identified
Question 58: The cinema is no longer as popular as it was in the 1930's and 1940's, but it is still an important ______ of

entertainment.
A. origin B. prospect C. status D. source
Question 59: They got lost in the forest, and ______ made matters worse was that night began to fall.
A. what B. it C. that D. which
Question 60: “Take a spare tyre ______ you have a puncture on the way to the beach.”
A. unless B. so that C. in case D. if
Question 61: Students are encouraged to develop critical thinking ______ accepting opinions without questioning them.
A. in addition B. instead of C. for instance D. because of
Question 62: “Could you turn off the stove? The potatoes ______ for at least thirty minutes.”
A. boiled B. were boiling C. have been boiling D. are boiling
Question 63: Jane had difficulty carrying her suitcase upstairs, and Mike, her friend, offered to help. Select the
most suitable response to fill in the blank.
Mike: “Need a hand with your suitcase, Jane?”
Jane: “______”
A. That’s very kind of you. B. I don’t believe it. C. Not a chance. D. Well done!
Question 64: He applied for a teaching ______ at Bales University with great confidence.
A. work B. post C. employment D. career
Question 65: We’ve already bought the house but won’t ______ it until May, when the present occupants have moved out.
A. keep track of B. take possession of C. gain recognition of D. catch sight of
Question 66: Phuong Thao is a student in Ms Lan’s writing class. She is asking for Ms Lan’s comments on her last essay.
Select the most suitable response to fill in the blank.
Phuong Thao: “You must have found reading my essay very tiring.”
Ms Lan: “______. I enjoyed it.”
A. At all costs B. Not in the least C. Just in case D. You are welcome
Question 67: Jessica looks very tired. She ______ have stayed up late to finish her assignment last night.
A. would B. will C. must D. should
Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to
the underlined word(s) in each of the following questions.
Question 68: Many parents may fail to recognize and respond to their children’s needs until frustration
explodes into difficult or uncooperative behavior.

A. slowly reaches the boiling point B. suddenly becomes uncontrollable
C. stays under pressure D. remains at an unchanged level
Question 69: Those children who stay longer hours at school than at home tend to spend their formative
years in the company of others with similar aims and interests.
A. forming a new business company B. being separated from peers
C. enjoying the care of parents D. being together with friends
Question 70: “A friend in need is a friend indeed”: Our friends have voiced their strong criticism of China’s
escalation of tension on our continental shelf.
A. easing the tension B. improving the condition
C. facing the reality D. worsening the situation
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the
correct answer to each of the questions from 71 to 80.
Centuries ago, man discovered that removing moisture from food helped to preserve it, and that the easiest
way to do this was to expose the food to sun and wind. In this way the North American Indians produced
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pemmican (dried meat ground into powder and made into cakes), the Scandinavians made stockfish and the
Arabs dried dates and apricots.
All foods contain water - cabbage and other leaf vegetables contain as much as 93% water, potatoes and
other root vegetables 80%, lean meat 75% and fish anything from 80% to 60% depending on how fatty it is. If
this water is removed, the activity of the bacteria which cause food to go bad is checked.
Fruit is sun-dried in Asia Minor, Greece, Spain and other Mediterranean countries, and also in California,
South Africa and Australia. The methods used vary, but in general the fruit is spread out on trays in drying
yards in the hot sun. In order to prevent darkening, pears, peaches and apricots are exposed to the fumes of
burning sulphur before drying. Plums for making prunes, and certain varieties of grapes for making raisins and
currants, are dipped in an alkaline solution in order to crack the skins of the fruit slightly and remove their wax
coating, so increasing the rate of drying.
Nowadays most foods are dried mechanically; the conventional method of such dehydration is to put food in
chambers through which hot air is blown at temperatures of about 110°C at entry to about 45°C at exit. This is
the usual method for drying such things as vegetables, minced meat, and fish.
Liquids such as milk, coffee, tea, soups and eggs may be dried by pouring them over a heated horizontal

steel cylinder or by spraying them into a chamber through which a current of hot air passes. In the first case,
the dried material is scraped off the roller as a thin film which is then broken up into small, though still relatively
coarse flakes. In the second process it falls to the bottom of the chamber as a fine powder. Where recognizable
pieces of meat and vegetables are required, as in soup, the ingredients are dried separately and then mixed.
Dried foods take up less room and weigh less than the same food packed in cans or frozen, and they do not
need to be stored in special conditions. For these reasons they are invaluable to climbers, explorers and soldiers
in battle, who have little storage space. They are also popular with housewives because it takes so little time to
cook them.
From Practical Faster Reading by Gerald Mosback and Vivien Mosback. CUP
Question 71: What is the main idea of the passage?
A. Water: the main component of food. B. Advantages of dried foods.
C. Mechanization of drying foods. D. Different methods of drying foods.
Question 72: The phrase “do this” in the first paragraph mostly means ______.
A. moisten foods B. expose foods to sun and wind
C. produce pemmican D. remove moisture from foods
Question 73: The word “checked” in the second paragraph is closest in meaning to ______.
A. motivated to develop B. reduced considerably C. put a tick D. examined carefully
Question 74: In the process of drying certain kinds of fruits, sulphur fumes help ______.
A. remove their wax coating B. kill off bacteria
C. maintain their color D. crack their skin
Question 75: Nowadays the common method for drying vegetables and minced meat is ______.
A. dipping them in an alkaline solution
B. spreading them out on trays in drying yards
C. putting them in chambers and blowing hot air through
D. pouring them over a heated horizontal steel cylinder
Question 76: What does the word “which” in the fourth paragraph refer to?
A. Foods B. Things C. Vegetables D. Chambers
Question 77: The final product of the process of drying liquids that uses the first method will be ______.
A. small flakes B. fine powder C. dried soup D. recognizable pieces
Question 78: Which of the following is NOT mentioned in the passage?

A. People in India began to use drying methods centuries ago.
B. Dried foods have several advantages over canned or frozen foods.
C. Fruit is usually dried by being laid out on trays in the sun.
D. Liquids are not dried in the same way as fruits and vegetables.
Question 79: According to the passage, dried foods are most useful for ______.
A. people who are on the move B. housewives who have little storage space
C. explorers who are underweight D. soldiers who are not in battle
Question 80: This passage is mainly ______.
A. analytical B. fictional C. argumentative D. informative


THE END
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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the
correct answer to each of the questions from 71 to 80.
The ability to conduct electricity is one of the key properties of a metal. Other solid materials such as silicon
can conduct electricity but only effectively at certain temperatures. Also, some substances such as salt (sodium
chloride) can conduct when molten or when dissolved in water. The ability of metals to conduct electricity is
due to how their atoms bond together. In order to bond together the metal atoms lose at least one of their
outermost electrons. This leaves the metal atoms with a positive charge and they are now strictly ions. The
lost electrons are free to move in what is known as a sea of electrons. Since the electrons are negatively
charged they attract the ions and this is what keeps the structure together.
An electric current is a flow of charge and since the electrons in the sea of electrons are free to move they
can be made to flow in one direction when a source of electrical energy such as a battery is connected to the
metal. Hence we have an electric current flowing through the wire, and this is what makes metals such good
conductors of electricity. The only other common solid conducting material that pencil users are likely to
encounter is graphite (what the ‘lead’ of a pencil is made from). Graphite is a form of carbon and again the
carbon atoms bond in such a way that there is a sea of electrons that can be made to flow as an electric
current. Likewise, if we have an ionic substance like salt we can make the electrically charged ions flow to
create a current but only when those ions are free to move, either when the substance is a liquid or dissolved in

water. In its solid state an ionic substance like salt cannot conduct electricity as its charged ions cannot flow.
Trang 6/6 – Mã đề 285

Electrical insulators are substances that cannot conduct electricity well either, because they contain no
charged particles or any charged particles they might contain do not flow easily. Water itself is a poor
conductor of electricity as it does not contain a significant amount of fully charged particles (the ends of a water
molecule are partly charged but overall the molecule is neutral). However, most water we encounter does
contain dissolved charged particles, so it will be more conductive than pure water. Many of the problems that
occur when touching electrical devices with wet hands result from the ever-present salt that is left on our skin
through perspiration and it dissolves in the water to make it more conductive.
By Helena Gillespie and Rob Gillespie. Science for Primary School Teachers. OUP

Question 71: Electrical conductivity is ______.
A. one of the most important properties of metals
B. one of the key properties of most solid materials
C. impossible for any substance when it is dissolved in water
D. completely impossible for silicon
Question 72: According to the passage, a metal can conduct electricity due to ______.
A. the absence of free electrons
B. its atoms with a positive charge
C. the way its atoms bond together
D. the loss of one electron in the core of its atoms
Question 73: The word “outermost” in paragraph 1 mostly means ______.
A. the lightest B. nearest to the inside
C. furthest from the inside D. the heaviest
Question 74: The atoms of a metal can bond together because ______.
A. the lost electrons cannot move freely in the sea of electrons
B. electrons can flow in a single direction
C. they lose all of their electrons
D. negatively charged electrons attract positive ions

Question 75: Salt in its solid state is not able to conduct electricity because ______.
A. it has free electrons B. its charged ions can flow easily
C. it cannot create any charged ions D. its charged ions are not free to move
Question 76: The word “they” in paragraph 3 refers to ______.
A. charged ions B. electric currents
C. charged particles D. electrical insulators
Question 77: Water is a poor conductor because it contains ______.
A. no positive or negative electric charge
B. only a small amount of fully charged particles
C. only a positive electric charge
D. only a negative electric charge
Question 78: We can have problems when touching electrical devices with wet hands because ______.
A. the water itself is a good conductor of electricity
B. the water dissolves the salt on our skin and becomes more conductive
C. the water contains too many neutral molecules
D. the water containing no charged particles makes it more conductive
Question 79: Which of the following is NOT true according to the passage?
A. Pure water is much more conductive than most water we encounter every day.
B. Graphite is a common solid substance that can conduct electricity.
C. Salt can conduct electricity when it is molten or dissolved.
D. Some materials are more conductive than others.
Question 80: Which of the following could best serve as the title of the passage?
A. Electrical Energy B. Electrical Devices
C. Electrical Insulators D. Electrical Conductivity

THE END