According to the last paragraph, _______.
A.species extinction has no relationship to human beings
B.what threaten plants and animals can do nothing to human beings
C.human beings depend on natural resources to survive
D.not every, species has a role in the circle of life.

 Without gravity, everything would float.
A.If there had been no gravity, everything would float.
B.If there had been no gravity, everything would have floated.
C.If there was no gravity, everything would float.
D.If there was no gravity, everything would have floated.

Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

A.competent
 
 
B.computer
C.compliance
D.commuter

Select the synonym of the following bold and underlined word in each sentence in the unit
We read newspapers and magazines which have been produced on computers.
A.born 
B.shaped 
C.begun 
D.manufactured

Choose the best answer among a, b, c, or d.
I was just ......... to go out when you telephoned
A.around
B.about
C.thinking
D.planned

It was only _____ he told me his surname that I realized that we had been to the same school.
A.then   
B. when 
C.until   
D.as soon as

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
"What were you doing last night, Mr John?" asked the police.
A.The police asked Mr John what he had been doing the night before.
B.The police asked Mr John what had he been done the night before.
C.The police asked Mr John what he had been done the night before.
D.The police asked what were you doing last night, Mr John.

There were over two hundred people at Carl’s trial, most of whom believed that he was not guilty of the crime.
 
A.The majority of the more than 200 people at Carl’s trial didn't think that he had committed the crime.
B.Carl had not committed the crime, and so more than 200 people came to his trial to show their support.
C.Over 200 people coming to Carl's trial must have intluenced the fact that he was not found guilty of the crime.
D.When it was announced that Carl had been found not guilty of the crime, there were over 200 people in the audience at his trial.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase for each of the blanks.  
            Located in central Africa, Lake Victoria is a very unusual lake. __( 44 )__ of the largest lakes in the world; it is also one of the youngest. Estimated to be about 15,000 years old, it is a relative baby compared with Earth’s other very large lakes, __( 45 )__ more than two million years old. Yet judging by the variety of life in it, Lake Victoria __( 46 )__ a much older body of water. Usually, lakes need a much longer time __( 47 )__ by a diverse array of life-forms. It is common for new lakes to contain only a small number of species. Lake Victoria, however, is packed with colorful fish, most notably, cichlids. There are __( 48 )__ 500 different species of just this one type of fish.
(From)
(44)
A.Not only is it one    
B.One is it only not
C.Is it one not only    
D.It not only one is

Mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that is OPPOSITE in meaning to the underlined part in each of the following questions from 21 to 22.
The minister came under fire for his rash decision to close the factory.
A.was penalized
B.was acclaimed
C.was criticized  
D.was dismissed