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Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Câu 1: The flowers ________ in a warm sunny place.
    


A. must have kept 


B. should keep    


C. must be keeping


D. should be kept
Câu 2: As the conversation went on, he became ________.
  


A. the more talkative 


B. more and more talkatively


C. more talkatively    


D. more and more talkative
Câu 3: She was doing her homework while her father _________ a football match.
  


A. watches                       


B. was watching   


C. watched                  


D. is watching
Câu 4: Johnny used to be one of the most _________ athletes in my country.


A. success                                    


B. successful               


C. successfully            


D. succeed
Câu 5: The old are ________ by their children in my country.
    


A. looked after


B. looked at   


C. looked for  


D.  looked up
Câu 6: __________ is a situation in which a plant, an animal, a way of life, etc. stops existing.


A. Conservation               


B. Extinction               


C. Habitat                    


D. Biodiversity
Câu 7: The International Red Cross has its _______ in Geneva, Switzerland.


A. companies                   


B. headquarters           


C. factories                  


D. buildings
Câu 8: Passengers ________ smoke until the signs have been switched off.


A. needn't                         


B. mightn't                   


C. mustn't                    


D. can't
Câu 9: Of the two sisters, Jane was ________.
    


A. the clever  


B. clever                      


C. the cleverer       


D. the cleverest
Câu 10: _________ from university, he joined the army.
       


A. Before he graduates


B. After he had graduated


C. When he has graduated 


D. While he was graduating
Câu 11: Don't throw stones ________ the birds. That's prohibited.
    


A. for                                


B. to                            


C. at                            


D. with
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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 word for each of the blanks.Carefully conducted studies that have followed the children of working mothers have not been able to show any long-term problems, compared with children whose mothers stayed at home. My personal______ (41) is that mothers should be allowed to work if they wish. Whether we like it or not, there are a number of mothers who just have to work. There are those who have invested such a big part of their lives in establishing a career that they cannot ______(42) to see it lost. Then there are many who must work out of pure economic _______(43) . Many mothers are not ______(44) to be full-time parents. After a few months at home with a much loved infant, they feel trapped and isolated.There are a number of options when it ______(45) to choosing childcare. These range from child minders and nannies through to Granny or the kind lady across the street, in reality, however, many parents do not have any choice; they have to accept anything they can get. Be prepared! No _______(46) how good the childcare may be, some children are going to protest wildly if they are left. This is a_____ (47) normal stage of child development. Babies separate well in the first six months, but soon after that they start to get a crush on Mum and close family______ (48) . Make sure that in the first week, you allow plenty of time to help your child settle in.All children are different. Some are independent, while others are more ______(49) to their mothers. Remember that if you want to do the best for your children, it‘s not the quantity of time you spend with them, it’s the ______(50) that matters.
Câu 1: ________( 41)


A. view


B. idea


C. thought


D. decision
Câu 2: ________(42)


A. afford


B. decide


C. hope


D. expect
Câu 3: _______(43)


A. reason


B. duty


C. necessity


D. task
Câu 4: _______(44)


A. made


B. cut


C. brought


D. born
Câu 5: _______(45)


A. refers


B. concerns


C. turns


D. comes
Câu 6: _______(46)


A.  way


B. matter


C. surprise


D. exception
Câu 7: _______(47)


A. perfectly


B. extremely


C. very


D. certainly
Câu 8: _______(48)


A.  people


B. adults


C. members


D. grown-ups
Câu 9: _______(49)


A.  used


B. attached


C. keen


D. fond
Câu 10: _______(50)


A. quality


B. attitude


C. behavior


D. manner
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Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.
Câu 1: The workers were made work really hard, but their wages were low.


A. the


B. work


C. hard


D. low
Câu 2: Some methods to prevent soil erosion are ploughing parallel with the slopes of hills, to plant trees on unproductive land, and rotating crops.


A. some


B. to prevent


C. are


D. to plant
Câu 3: Pop Art was a movement of the 1950's and 1960’s whom imagery was based on readily recognized American products and people.


A. a movement


B. whom


C. based on


D. people
Câu 4: All almost the electricity for industrial use comes from large generators driven by steam turbines.


A. all most


B. industrial use


C. from


D. driven
Câu 5: The Egyptians first discovered that drying fruit preserved it, made it sweeter, and improvement its flavor.


A. first


B. drying


C. sweeter


D. improvement

A.
B.
C.
D.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Câu 1: Those letters_______ now. You can do the typing later.


A. needn’t be typed


B. need to type


C. need typing


D. needn’t to type
Câu 2: Let’s go for a coffee_______.


A. won’t we


B. shall we


C. will we


D. will you
Câu 3: It was suggested that the applicants ______on time for the interview tomorrow morning.


A. would arrived


B. arrive


C. arrived


D. had arrived
Câu 4: “Did you go to the shopping mall to see a movie last night?" “Yes, but I______ home, because I had a little fever."


A. would rather stay


B. would rather stayed


C. would stay


D. would rather have stayed
Câu 5: It is obvious that neither the students _______responsible for it.


A. nor the teachers are


B. nor the teacher were


C. nor are the teachers


D. nor the teacher is
Câu 6: _______unprepared for the exam, I felt sure I would get a low score.


A. Although


B. Having


C. Because


D. Being
Câu 7: We were angry about the situation and insisted_____ by the president.


A. to see


B. on being seen


C. on seeing


D. to be seen
Câu 8: I’m always willing to help you. Just tell me what ______me to do.


A. want


B. you do want


C. do you want


D. you want
Câu 9: Only after _______how much damage had been caused.


A. I realized


B. I had realized


C. did I realize


D. I would realize
Câu 10: I need____ to finish a bench, and I'll go and look in the garage.


A. one more wood


B. much woods


C. many woods


D. a piece of wood
Câu 11: Fifty years ago, we needed______ than we do today.


A. less mathematic


B. less mathematics


C. fewer mathematics


D. fewer mathematic
Câu 12: That_____ film entitled “Workers” deals with workers in China.


A. document


B. documentary


C. documented


D. documenting
Câu 13: “I couldn’t go to work yesterday, because my car broke down." “You______ mine. I wasn‘t using it."


A. could borrow


B. may borrow


C. could have borrowed


D. needn’t have borrowed
Câu 14: "What was your impression of last night‘s movie?” “ _____speaking, I thought it was rather boring."


A. Very


B. Really


C. Honest


D. Honestly
Câu 15: The knee is_____ most other joints in the body because it cannot twist without injury.


A. more likely to be damaged than


B. likely to be more than damaged


C. more than likely to be damaged


D. to be damaged more than likely
Câu 16: Following the guidelines for speaking and voting established by the book Robert's Rules of Order, ________during meetings.


A. and avoid large decision-making organizations’ procedural confusion


B. large decision-making organizations avoid procedural confusion


C. is procedural confusion avoided by large decision-making organizations


D. are avoiding procedural confusion in large decision-making organizations
Câu 17: A critic, teacher, librarian, or poet who hopes to broaden poetry’s audience faces the difficult challenge of persuading skeptical readers_________


A. that poetry is important today


B. for poetry to be important today


C. to be important poetry today


D. poetry that is important today
Câu 18: Maehala Jackson, ______combined powerful vitality with great dignity, was one of the best known gospel singers in the United States.


A. it was her singing


B. which songs


C. who sang


D. whose singing
Câu 19: The first building to employ steel skeleton construction,______


A. Chicago, Illinois, the home of the Home Insurance Company Building completed in 1885


B. the Home lnsurance Company Building in Chicago, Illinois, was completed in 1885


C. because the Home lnsurance Company Building in Chicago, Illinois, was completed in 1885


D. the Home insurance Company Building in Chicago, Illinois, in 1885
Câu 20: Algokian-speaking Native Americans greeted the Pilgrims______ settled on the eastern shores of what is now New England.


A. to whom


B. of which


C. who


D. which
Câu 21: More people speak English than any other language, but non-native speakers now_____ native speakers by three to one.


A. outnumber


B. overtake


C. pass


D. dominate
Câu 22: Father would not _______us to go there for the weekend.


A. let


B. permit


C. agree


D. consent
Câu 23: Every day the old man's dog goes to ________the shop to him a newspaper.


A. carry


B. fetch


C. take


D. bring
Câu 24: Although he hasn‘t said anything, he______ to be upset about it.


A. acts


B. shows


C. behaves


D. seems
Câu 25: I have had a toothache for a week now. I must _______an appointment to see the dentist.


A. take


B. do


C. make


D. work
Câu 26: In public places, you should ask everyone for permission before you ________a cigarette.


A. put out


B. put up


C. turn up


D. light up
Câu 27: I couldn’t believe that they were brothers. They were as different as_______


A. Mars from Jupiter


B. chalk from cheese


C. dogs and cats


D. milk from honey
Câu 28: Smoking is _____forbidden everywhere in that factory.


A. strictly


B. hardly


C. severely


D. harshly
Câu 29: They live in a very _______populated area of Italy.


A. sparsely


B. barely


C. hardly


D. scarcely
Câu 30:  “Would you like another coffee?" "________"


A. I'd love one.


B. Willingly.


C. Very kind of your part.


D. its a pleasure.
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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.American Online is one of the big name on the Internet, and unlikely many other digital companies, it actually makes a profit. But the company which its rivals call the “Cyber-cockroach" was launched only in I992. Before that it was a small firm calledcontrol Video Corporation, and it made video games. Then Steve Case, a former Pizza Hut marketing executive arrived and took the company online, innovative, fast moving, and user-friendly, American Online appeals to people who want to surf the Internet, but who do not have a lot of experience. For the same reason “teachies", people who think they are more expert with computers, look down on American Online and its users. Recently, American Online (or AOL), as it calls itself) joined with Time Warner - a multi-million-dollar movie and magazine company - to create a L multimedia giant.Now, AOL has begun to expand abroad. In many European countries, including the United Kingdom, it is hard to buy a computer magazine that does not have a free AOL introductory offer. The company also puts advertisements onto the television, and employs people to hand out its free introductory disks at places like train stations. As the lnternet gets faster AOL is changing. With many homes getting high-speed connections through fiber optic cables or the new ADSL technology, the “Cyber- cockroach" will have to show that, like real cockroaches, it can survive in almost any environment.
Câu 1:  What is the passage about?


A. A computer company.


B. A software company.


C. An Internet company.


D. A video company.
Câu 2: The word “it" in paragraph 1 refers to______


A. American Online


B. Cyber-Cockroach


C. Control Video Corporation


D. Digital company
Câu 3: Who does Steve Case work for?


A. AOL


B. Pizza Hut


C. Control Video Corporation


D. None of these
Câu 4: How do “teachies” feel about American Online?


A. They think it is a Cyber-cockroach.


B. They think it is for experts.


C. They think it is a movie and magazine company.


D. They feel superior to its users.
Câu 5: American Online has the following characteristics EXCEPT______


A. innovative


B. fast moving


C. user-friendly


D. experienced
Câu 6: People who use American Online are probably______


A. video game players


B. "teachies”


C. movie fans


D. people new to the Internet
Câu 7: American Online is an unusual digital company because_____


A. it used to make video games


B. it is innovative


C. it makes money


D. it has joined with another company
Câu 8: Which marketing idea is not mentioned?


A. Advertisements on the lnternet.


B. Advertisements on TV.


C. Free disks in journals.


D. People giving disks away.
Câu 9:  What does the article say about AOL’s future?


A. It will do well.


B. It will do badly.


C. It will face challenges.


D. The article doesn’t say.
Câu 10: This passage is about_____


A. technology


B. a history of the Internet


C. computer users


D. a successful business
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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.The goal of Internet-based encyclopedia Wikipedia (www.wikipedia.org) is to give everyone the planet access to information. Like other encyclopedias. Wikipedia contains lot of information: more than 2.5 million articles in 200 different languages covering just about every subject. Unlike other encyclopedias, however, Wikipedia is not written by experts, but by ordinary people. These writers are not paid and their names are not published. They contribute to Wikipedia simply because they want to share their knowledge.Encyclopedias began in ancient times as collections of writings about all aspects of human knowledge. The word itself comes from ancient Greek. and means “a complete general education". Real popularity for encyclopedias came in the nineteenth century in Europe. and the United States. with the publication of encyclopedias written for ordinary readers. With the invention of the CD-ROM, the same amount of information could be put on a few computer discs. Then with the Internet, it became possible to create an online encyclopedia that could be constantly updated, like Microsofts Encarta. However, even Internet-based encyclopedias like Encarta were written by paid experts. At first, Wikipedia, the brainchild of Jimmy Wales, a businessman in Chicago, was not so different from these. In 2001, he had the idea for an lnternet-based encyclopedia that would provide information quickly and easily to everyone. Furthermore, that information would be available free, unlike other lnternet encyclopedias at that time.But Wales, like everyone else, believed that people with special knowledge were needed to write the articles, and so he began by hiring experts. He soon changed his approach: however, as it took them a long time to finish their work. He decided toopen up the encyclopedia in a radical new way, so that everyone would have access not only to the information, but also to the process of putting this information online. To do this, he used what is known as “Wiki" software (from the Hawaiian word forfast"), which allows users to create or alter content on web page. The system is very simple: When you open the web site, you can simply search for information or you can log on to become a writer or editor of articles. If you find an article that interests you - about your hometown, for example - you can correct it or expand it. This process goes on until no one is interested in making any more changes.
Câu 1: Wikipedia is a(n) _____.


A. book


B. journal


C. article


D. dictionary
Câu 2: Wikipedia is written by_____


A. paid writers


B. millionaires


C. normal people


D. world experts
Câu 3: The phrase “these writers” in the first paragraph refers to______


A. ordinary readers


B. ordinary people


C. encyclopedia experts


D. every subjects
Câu 4:  The phrase “the word” in the second paragraph refers to______


A. knowledge


B. encyclopedia


C. writing


D. collection
Câu 5: Microsoft’s Encarta is cited in the passage as an example of_____


A. CD-ROM dictionary


B. printed encyclopedia


C. online encyclopedia


D. updateable online encyclopedia
Câu 6: The word “brainchild“ in the second paragraph can best be replaced by_____


A. born


B. child


C. product


D. father
Câu 7:  The word “approach" in the third paragraph means_____


A. idea


B. time


C. method


D. writing
Câu 8: The user of Wikipedia can do all of the following EXCEPT______


A. have access to information


B. abolish the website


C. modify information


D. edit information
Câu 9: We can say that Jimmy Wales______


A. became very famous after the formation of Wikipedia


B. is the father if Wikipedia


C. made a great profit from Wikipedia


D. decides who can use Wikipedia
Câu 10: Wiki software enables_______


A. exchanging articles


B. a purchase of information


C. limited access


D. editing
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Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.
Câu 1: Algebra is the branch of mathematics concerned with operations on sets of numbers or other elements that are often represented at symbols.


A. branch


B. on sets


C. elements


D. at
Câu 2: A conductor uses signals and gestures to let the musicians to know when to play various parts of a composition.


A. uses


B. musicians


C. to know


D. to play
Câu 3: Her absent form work without any permission made the boss so angry that he threatened to sack her.


A. absent


B. permission


C. angry


D. so sack
Câu 4: When a Vietnamese wants to work part-time in Australia, he needs to get a work permission.


A. Vietnamese


B. part-time


C. needs


D. permission
Câu 5: Our neighbor is quite safe because there have not been many crimes recently


A. neighbor


B. safe


C. many


D. recently

A.
B.
C.
D.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Câu 1: By 2050, medical technology_______ many diseases.


A. has conquered


B. will conquer


C. will have conquered


D. is conquering
Câu 2: Neither of them will be treated preferentially,________?


A. won't they


B. will they


C. won’t them


D. will them
Câu 3: She turned off the record player_______ she could study.


A. in case


B. but


C. so that


D. even if
Câu 4: Precious metals, gems, and ivory have been used to make buttons, but most buttons are made of ______wood, glass, or plastic.


A. such materials that


B. materials such as


C. such materials as


D. such materials
Câu 5: _______that Columbus sailed to America.


A. That was in 1492


B. It was in 1492


C. In 1492


D. It is in 1492
Câu 6: Margaret Brent, because of her skill in managing estates, became ________, largest landholders in colonial Maryland.


A. what the


B. one of the


C. who the


D. the one that
Câu 7: Scientists believe the first inhabitants of the American arrived by crossing the land bridge that connected Siberia and ______more than 10,000 years ago.


A.  this is Alaska now 


B. Alaska is now


C. is now Alaska


D. what is now Alaska
Câu 8: The photographs of Carrie Mae Weems, in which she often makes her family members_______ , are an affectionate and incisive representation of the African American experience.


A. are her subjects


B. her subjects


C. are subjects


D. which her subjects
Câu 9: The American Academy of Poets, ______the 1930’s, provides financial assistance to support working poets.


A. when it was founded


B. was founded


C. which was founded in


D. was founded in
Câu 10: As consumers’ response to traditional advertising techniques declines, businesses are beginning ______new methods of reaching customers.


A. the development that


B. is developing


C. develop


D. to develop
Câu 11: In the early 16th century the geography of the globe still _______a mystery.


A. maintained


B. continued


C. was


D. remained
Câu 12: “Those students will perform a play." “Yes, it is _______for next week.“


A. due


B. scheduled


C. time-table


D. put on
Câu 13: When he heard the joke, he burst into loud_______


A. amusement


B. laughter


C. smile


D. laughing
Câu 14: The boss______ to his secretary using the office phone for personal calls.


A. disagrees


B. objects


C. criticizes


D. disapproves
Câu 15: A university education is of course important but it is essential that all employeesundergo a period of intensive_______


A. preparation


B. learning


C. training


D. concentration
Câu 16: After a quick _______at the patient, the doctor rang for an ambulance.


A. glance


B. stare


C. glimpse


D. gaze
Câu 17: The house is______ fire, Send____ the Fire Brigade.


A. on - for


B. on - to


C. in - for


D. in - during
Câu 18: My brother usually_______ at cards. It’s no surprise that he wins every game.


A. lies


B. misleads


C. deceives


D. cheats
Câu 19: It was very _________of you to notice that.


A. observe


B. observation


C. observatory


D. observant
Câu 20: Associated with the Denishawn Company from 1916 until 1923, Martha Graham developed a powerful, _______that was integral to the foundations of modern dance.


A. expressively stylish


B. a style expressive


C. stylishly expressive


D. expressive style
Câu 21: The best known books of Ross Macdonald, ________ writer of detective novels, feature the character Lewis Archer, a private detective.


A. is the


B. is an


C. they are by


D. the
Câu 22: ______that managers commit in problem solving is jumping to a conclusion about the cause of a given problem.


A. Major errors


B. Since the major error


C. The major error


D. Of the major errors
Câu 23: The members of the Red Cross were dedicated their whole life to _____the suffering of human beings.


A. reducing


B. reductive


C. reduction


D. reduce
Câu 24: "Where is the bus terminal?" ‘'It is _____the Red Cross hospital.”


A. opposite


B. opposed to


C. opposite with


D. opposite to
Câu 25:  “Tom is not doing well.” “You must _______, though, that he is just a beginner."


A. keep minding


B. keep to mind


C. keep in mind


D. keeping in mind
Câu 26: Indigo is a vat color, _______called because it does not dissolve in water.


A. which it


B. it is


C. but


D. so
Câu 27: As I won’t be able to attend the meeting. l‘d like you to sign ______


A. on my account


B. on my name


C. on my place


D. on my behalf
Câu 28: “ _______" “Try some sleeping pills."


A. just can't sleep well lately.


B. Did you have a good sleep?


C. Do you have sleeping pills?


D. Can you sleep well?
Câu 29: “There‘s a baseball game tonight." "_____"


A. Great. Let’s go.


B. I'm not a real fan of hers.


C. Don’t mention it.


D. Thanks. l’d love to.
Câu 30:  “How about an evening riverboat tour?" "______"


A. No, it‘s good to do so.


B. Actually I've never gone on an evening riverboat tour.


C. No, l’ve never gone on an evening riverboat tour.


D. Actually l’ve gone twice this week.
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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.Cooperation is the common endeavor of two more people to perform a task or reach a jointly cherished goal. Like competition and conflict, there arc different forms of cooperation, based on group organization and attitudes. In this form, known as primary cooperation, group and individual fuse. The group contains nearly all of each individual's life. The rewards of the group’s work are shared with each member. There is an interlocking identity of individual, group, and task performed. Means and goals bccome one, for cooperation itself is valued.While primary cooperation is most often characteristic of preliterate societies, secondary cooperation is characteristic of many modern societies. in secondary cooperation, individuals devote only part of their lives to the group. Cooperation itself is not a value. Most members of the group feel loyalty, but the welfare of the group is not the first consideration. Members perform tasks so that they can separately enjoy the fruits of their cooperation in the form of salary, prestige, or power. Business offices and professional athletic teams are examples of secondary cooperation. In the third type, called tertiary cooperation or accommodation, latent conflict underlies the share work. The attitudes of the cooperation parties are purely opportunistic; the cooperation is loose and fragile. Accommodation involves common means to achieve antagonistic goals; it breaks when the common means cease to aid each party in reaching its goal. This is not, strictly speaking, cooperation at all, and hence the somewhat contradictory term '‘antagonistic cooperation” is sometimes used for this relationship.Notes:-          latent (adj): existing, but not yet very noticeable (ngấm ngầm, tiềm tàng).-          antagonistic (adj): showing opposition (trái ngược, đối lập).
Câu 1: What is the authors main purpose in the first paragraph of the passage?


A. To urge readers to cooperate more often.


B. To explain how cooperation differs from competition and conflict. 


C. To offer a brief definition of cooperation.


D. To show the importance of group organization and attitudes.
Câu 2: The word “cherished” in paragraph 1 is closest in meaning to __________ .


A. agreed on


B. prized  


C. set up


D. defined
Câu 3: Which of the following statements about primary cooperation is supported by information in passage?


A. It was confined to prehistoric times.


B. It is usually the first stage of cooperation achieved by a group of individuals attempting to cooperate.


C. It is an ideal that can never be achieved.


D. It is most commonly seen among people who have not yet developed reading and writing skills.
Câu 4:  The word “fuse” in paragraph 1 is closest in meaning to _________ .


A. evolve 


B.  unite 


C. explore


D. react
Câu 5: According to the passage, why do people join groups that practice secondary cooperation?


A.  To associate with people who have similar backgrounds.


B. To get rewards themselves. 


C. To defeat a common enemy.


D. To experience the satisfaction of cooperation.
Câu 6: The word “fragile” in paragraph 2 is closest in meaning to ________ .


A. easily broken 


B. inefficient


C. involuntary


D. poorly planned
Câu 7: Which of the following is an example of the third form of cooperation as it is defined in the passage?


A. Students form a study group so that all of them can improve their grades.


B. A new business attempts to take customers away from an established company.


C. Two rival political parties temporarily work together to defeat a third party. 


D. Members of a farming community share work and the food that they grow.
Câu 8: As used throughout the passage, the term “common” is closest in meaning to which of the following?


A.  Popular


B. Shared 


C. Vulgar   


D. Ordinary
Câu 9: Which of the following is NOT given as a name of the third type of cooperation?


A. Latent conflict 


B.  Accommodation


C. Tertiary cooperation 


D.  Antagonistic cooperation
Câu 10: Which ofthe following best describes the overall organization of the passage?


A. The author describes a concept by analyzing its three forms.


B. The author compares and contrasts two types of human relations.


C. The author presents the points of view of three experts on the same topic.


D. The author provides a number of concrete examples and then draws a conclusion.
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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.It’s a sound you will probably never hear, a sickened tree sending out a distress signal. But a group of scientists has heard the cries, and they think some insects also hear the trees and are drawn to them like vulture to a dying animal. Researchers with the US Department of Agriculture’s Forest Service fastened sensors to the bark of drought-stricken trees clearly heard distress calls. According to one of the scientists, most parched trees transmit their plight in the 50-hertz to 50-kilohertz range. (The unaided human ear can detect no more than 20 kilohertz). Red oak, maple, white pine, and birch all make slightly different sounds in the form of vibrations at the surface of the wood.The scientists think that the vibrations are created when the water columns insidc tubes that run along the length of the tree break, a result of too little water following through them. These fractured columns send out distinctive vibration pattems. Because some insects communicate at ultrasonic frequencies, they may pick up the trees' vibration and attack the weakened trees. Researchers are now running tests with potted trees that have been deprived of water to see if the sound is what attracts the insects. “Water-stressed trees also smell differently from other trees, arid they experience thermal changes, so insects could be responding to something other than sound,’' One scientist said.Notes:-          vulture (n): chim kền kền.-          potted (adj): mọc lên trong chậu.-          distress call (n): tiếng kêu báo tin nguy cấp.-          oak (n): cây sồi; maple (n): cây thích; birch (n): cây cáng lò, cây bulô.
Câu 1: Which of the following is the main topic of the passage?


A. The vibrations produced by insects. 


B. The sound made by trees. 


C. The mission of the us Forest Service.


D. The effect of insects on trees.
Câu 2: The word “them” in line 3 refers to  _________ .


A. scientists


B. trees


C. vultures 


D. insects
Câu 3: The word “parched” in paragraph 1 is closest in meaning to  _________  .


A. recovered 


B. burned 


C. damaged


D. dehydrated
Câu 4: It can be inferred from the passage that the sounds produced by the trees ________ .


A. are the same no matter what type of tree produces them


B. cannot be heard by the unaided human ear 


C. fall into the 1-20 kilohertz


D. serve as a form of communication among trees
Câu 5: The word “plight” in paragraph 1 is closest in meaning to  ________ .


A. condition


B. cry


C. agony


D. need
Câu 6: All the following are mentioned as possible factors in drawing insects to weakened trees EXCEPT  ________ .


A. thermal changes 


B. smells


C. sounds  


D. changes in colors
Câu 7: Which of the following could be considered a cause of the distress signals of trees?


A. lack of water  


B.  attacks by insects


C.  experiments by scientists


D. torn roots
Câu 8: The word “fractured” in paragraph 2 is closest in meaning to _________ .


A.  broken


B. hollow


C. long   


D.  blocked
Câu 9: It can be inferred from the passage that research concerning the distress signals of trees  _________ .


A. is no longer sponsored by the government


B. has been unproductive up to now


C. was conducted many years ago


D. is continuing
Câu 10: The phrase “pick up” in paragraph 2 could best be replaced by which of the following?


A.  attack  


B. lift 


C. transmit


D. perceive
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