Choose the best answer for the following sentence:
During the summer, volunteer students help _________________ poor in the city to repair
their shelters.
 
A.  a                            
B. an                      
C.  the                 
D.  no article

Choose the best answer for the following sentence:
I telephoned David at 4.30, but ____________ .
A. he has already left the office
B. he was already leaving the office
C. he would have already left the office
D. he had already left the office

Choose the best answer for the following sentence:
If you want to find good information about graduate programs in the United States, look in ________________ of the College Blue Books.
 
A. volume two                                   
B. the volume two 
C. volume second                          
D. second volume

Choose the best answer for the following sentence:
We don’t have ______________________ tonight. 
A. many homeworks                  
B. many homework 
C. much homeworks                 
D. much homework

Choose the best answer for the following sentence:
__________ you give me some advice about the language course? 
A. Have  
B. Should  
C. May  
D. Could

A. 0.
B. -1.
C. 5.
D. -3.

Choose the best answer for the following sentence:
Very few passenger ships cross ___________ Atlantic these days.
A. an
B. the
C. Ocean
D. Ø

Cho hàm số  y=cos22x. Vi phân của hàm số tại x là:
A. dy=4cos2xsin2xdx.
B. dy=2cos2xsin2xdx.
C. dy=-4cos2xsin2xdx.
D. dy=-2cos2xsin2xdx.

Choose the best answer for the following sentence:
His decision merited the ___________ of any sensible person. 
A. access               
B. acceptation                   
C. approval                   
D. appearance

Choose the best answer for the following sentence:
My new friend is a law student and he _________ for three years now.
A. studies
B.  is studying
C. was studying
D. has been studying