( ) 11.__________Liu Xiang failed to compete in the 2008 Beijing Olympic Games, he is still a hero in the eyes of our Chinese people.
A. Although
B. Since
C. So
D. Because
答案：A
( )12._________is terribly tiring working late like_________
A. This ; it
B. It; this
C. What;it
D. It; what
答案：B
( )13. The shop assistant didn't give me the right_________
A. change
B. money
C. serve
D. Note
答案：A
( )14. There aren't many pandas_________in the world today.
A. alive
B. living
C. lively
D. Lived
答案：A
( )15. We never dared to ask him a question,__________?
A. did we
B. didn't we
C. dared we
D. daredn't we
答案：A
( )16. Five minutes earlier,_________ we could have caught the last train.
A. of
B. but
C. and
D. So
答案：C
( ) 17. The roof fell_________he had time to dash into the room to save his baby.
A. since
B. as
C. before
D. until
答案：C
( )18. After studying in a medical college for five years,Jane_________her job as a doctor in the countryside.
A. set out
B. took over
C. took up
D. set up
答案：C
( )19. In the geography lesson,the teacher told the children that the earth_________round like a ball.
A. was
B. is
C. were
D. had been
答案：B
( )20. Whatever you do, you_________ click with the right mouse button or the program will crash.
A. must not
B, don't have to
C. doesn't have to
D. needn't
答案：A
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