Read the followingpassage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer for each of the question.

It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a change environment, _it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately,    in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best - known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died. Mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. The periodic extinction might be due to intersection of the earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability or inability to adapt. If so, some of revolutionary history may reflect a sequence of essentially random events.

Which of the following is NOT mentioned in paragraph 1 as resulting from rapid ecological change? 

A. Temperature changes 

B. Availability of food resources 

C. Introduction of new species 

D. Competition among species

Read the following passage and mark A, B, C, or D to indicate the correct answer to each of the blanks.

          Everyone needs a home where they feel sheltered and safe. Today we live in modern flats and houses, (36) ___________ have air-conditioning to keep us cool, and heating to keep us warm. There is electricity for lighting and supplies of gas or oil for the heating. Hot and cold water (37) ___________ from the taps and dirty water disappears (38) ___________ the drains. Many of our homes have balconies or gardens. In the past, people made their homes from materials that they found nearby. When we look at different houses we can tell how old they are from the materials used and the way they were built. It was different long (39) ___________ people did not have water in their homes and there were no electric lights. To keep warm, they sometimes made (40) ___________ inside their homes. With a fire started they could cook their food and heat water.

Điền vào số (40)

A. flames    

B. food       

C. furnaces  

D. fires

Choose the word in each group that has the underlined part pronounced differrently from the rest

A. fossil

B. session

C. discuss

D. progress

Không giải phương trình, hãy tính tổng và tích các nghiệm (nếu có) của mỗi phương trình sau: 

159x2 – 2x – 1 = 0.

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the following questions

The Government has brought ………………a new law in an effort to prevent further environmental deterioration

A. in 

B. about 

C. up 

D. on

Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the following questions

A waiter in a restaurant is talking to a customer who has just finished his meal there. Select the most suitable response to complete the exchange

- Waiter: “Here’s your bill, sir”

- Customer: “………………………”

A. Don’t mention it 

B. Can I pay by credit card?

C. What do you have? 

D. You’re welcome

Dùng điều kiện a + b + c = 0 hoặc a – b + c = 0 để tính nhẩm nghiệm của mỗi phương trình sau:

4321x2 + 21x – 4300 = 0

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 32to 38.

         In  the  20 th century,  magazines  have  been  a  major  growth  area  of  popular  publishing.  Specialist  magazines  cater  to  every  imaginable  field  and  activity.  In  the  United  Kingdom,  over  12,000 periodicals,  magazines,  bulletins,  annuals,  trade  journals,  and  academic  journals  are  published  on  a regular basis. There are some 40 women‘s magazines and over 60 dealing with particular sports games, hobbies,  and  pastimes.  Although  some  US  magazines,  such  as  The  Saturday  Evening  Post,  has succumbed  to the  circulations, The Reader‘s Digest over 16 million, the National Geographic over 10 million. For many people, magazines have been the most available and widely used form of continuing education, providing information about history, geography, literature, science, and the arts, and as well as guidance on gardening, cooking, home decorating, financial management, psychology, even marriage and family life.
            Until the rise of television, magazines were the most available form of cheap, convenient entertainment in the English-speaking world. Radio served a similar function, but it was more limited in what it  could do. Magazines and television, however, both address the more powerful visual sense. During the third quarter of the 20 thcentury, coincident with a dramatic rise in the popularity of television, many generalinterest, especially illustrated magazines went out of business. The shift in attention of a mass audience from reading such magazines to watching television has been a major factor in this decline, but it is an implicit  tribute  to  the  older  genre  that  its  programs  are  generally  organized  i n  a  single  format  and content.

According to the passage, which of the following magazines is no longer printed?

A. The Saturday Evening post     

B. The Reader‘s Digest       

C. The Natio

D. The National Geographic

Chất nào sau khi phản ứng với dung dịch KOH tạo ra muối và anđehit?

A. etyl fomat

B. metyl axetat

C. phenyl butirat

D.  vinyl benzoat