21. Jenny ______with him at that time, for I was having dinner with her in a restaurant.

A. can’t have been　 　　　　B. mustn’t have been

C. must be　　　　 　　　　D. may be

20. Frank tried to save the ______ girl in the river, but unfortunately he was ______.

A. drowned; drowning　　　 　B. drowning; drowned

C. drowned; drowned　　 　　D. drowning; drowning

19. You promised you should take the children to Beijing, so you must ______.

A. keep words　　 B. keep a word　　　 C. keep your word　 　D. keep your words

18. -Daddy, can you buy me a new MP3 when you go to Beijing?

　 -You ______ get one if you are admitted to a key middle school.

A. could　　 　 B. shall　　 　 C. will　　　　　　 　　 D. can

17. Lewis was much admired ______ his work on the advanced medical research.

　 A. on　　　　 　 　B. in　　　　 　 C. for　　　　　　　 　　　　 D. with

16. The young mother treats the poor orphan(孤儿) as though he ______ her child.

　 A. is　　　 　B. has been　 　C. had been　　 　　D. were

15. They decided that the meeting should ____ on Monday.

　 A. hold　 　　B. happen　 　C. be taken place　 　D. take place

14. She found that the beautiful dress she had been _______ to _____ to others.

A.　　 looked forward; sold　　　　　 B. looking forward; was sold

C.　　　 looking forward; sold　　　　 D. looked forward; selling

13. After studying hard day and night, he ________ pass the exam.

A. could　 　　B. can　 　　　C. was able to 　　　D. should

12. Your article is too long; you must _______ to about 3,000 words.

A. cut it off　　 　　B. cut it up　 　　C. cut it out　 　　　D. cut it down