1. D 　2. C 　3. B 　4. B 　5. D 　6. D 　7. A 　8. A 　9. B 　10. D　 11. B 　12. D 　13. A 　14. A　 　15. C 　16. C 　17. A 　18. D 　19. D 　20. D

解析：

20. If you ________ keep out of the trouble, you must keep your mouth shut.

A. should　　　　　　 B. will

C. are going to　　　　 D. are to

Key:

19. Another headache _____ she’s another difficult question to me!

A. set　　 B. made up　 C. asked　　 D. put

17. No teacher and no student _____ allowed to use these books.

A. is　　　 B. are　　　 C. has　　　 D. have

l8. You’ll have to ________ your paper carefully before you ________

A: look at, hand in it　 B. look up, turn in it

C. look on, give it in　 D. look through, turn it in

16. ________ the villagers ________ to go a long way to fetch water in those years?

A. Was, used　　　　　 B. Had, used

C. Used, /　　　　　　 D. Did, used

15. The well is polluted. The water isn’t fit ____.

A. to be drunk　　　　 B. for being drunk

C. to drink　　　　　 D. drinking

14. You are so tall. This little bed won’t _____ for you.

A. do　 B. fit　　 C. care　　 D. prepare

13. -Did you see him yesterday?

　 -No, but I_______.

A. should have　　　　　 B. ought to

C. cannot have　　　　　 D. must have

12. You must get here on time, say, at six tomorrow,_____we’ll leave without you.

A. but　　 B. and　　 C. for　 D. otherwise

11. -Surely his telephone number is in this book.

-Yes, but_____, I have to look through the whole book very carefully.

A. finding it　　　　　 B. to find it

C. for finding it　　　　 D. by finding it