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.
A drug may affect several functions, even though it’s targeted at only one.
A.A drug is taken for a specific purpose, but it may have a range of other effects.
B.However effective a drug may be, its functions have to be several.
C.Despite various other uses, a drug usually has a function for a special effect.
D.The functions expected of a drug are various even if it is used for a specific disease.

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
The burglar might come back. You’d better change all the locks.
A.If you don’t change all the locks, the burglar could come back.
B.The burglar will come back unless you change all the locks.
C.You’d better change all the locks or the burglar will come back.
D.You’d better change all the locks in case the burglar will come back.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Several animals are in danger of extinction. We should find ways to protect _______.
A.us                            
B.them                                             
C.ourselves                                
D.themselves

Nam is not very good ______mathematics.
A.in
B.on
C.by
D.at

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.
John has learnt English for five years ago.
       
A.John                                    
B.ago
C.English                   
D.has learnt

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Don’t be late for the class often, _______ people will think you are a disobedient student.         
A.otherwise                            
B.if not         
C.or so     
D.unless

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Scarcely had he stepped out of the room ______ he heard a loud laughter within.           
A.until                                    
B.then                         
C.than
D.when

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Air pollution is getting ________ serious in big cities in the world.       
A.more and more    
B.the most and the most    
C.most and most                     
D.the more and the more

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
He asked me _______ that film the night before.
A.if had I seen      
B.that I saw 
C.had I seen 
D.if I had seen

Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in the position of primary stress in each of the following questions.

A.workforce               
B.bamboo                   
C.exist
D.survive