50.　　 --- Why is Jenny still standing there? It’s so cold.

-She _____ for someone.

A. can wait　　　 B. might have waited　　 C. must be waiting　　 D. should have waited

49.　　 His homework______, but it _____.

A. needs correcting; needn’t rewriting

B. need be corrected; doesn’t need to be rewriting

C. needs correcting; needn’t be rewritten

D. needs to be corrected; needn’t to be rewritten

48.　　 The boy stood there without _____ a word.

A. dare to say　　 B. daring to say　　　 C. dared to say　 D. dare say

47.　　 -I didn’t see her yesterday.

-Of course, you _____, because she had gone to a trip.

A. can’t　　　 B. may not have　　　 C. can’t have　　　 D. mustn’t have

46.　　 　-You know that you were driving at 100 kilometers per hour, don’t you?

-No, officer, I _____ have been. This car can’t do more than 80.

A. mustn’t　 B. shouldn’t　　　 C. may not　　 D. couldn’t

45.　　 -May I speak to the patient now?

-No, you _____. He is too weak now.

A. needn’t　 B. may not C. mustn’t　　　 D. oughtn’t

44.　　 -Why am I so slow at doing the cloze test?

-I guess you didn’t realize the use _____ the contexts.

A. you should have made of

B. you must have made from

C. of which you could have from

D. out of which you need make

43.　　 My MP4 player isn’t in my bag. Where 　　　　I have put it?

A. can　　　　　　　　　　　　　 B. must　　　　　　　　　　　　 C. should　　　　　　　 D. would

42.　　 The biggest problem for most plants, which ______ just get up and run away when threatened, is that animals like to eat them.

A. shan’t　　　　 B. can’t　　　　　 C. needn’t　　　　 D. mustn’t

41.　　 　-Why hasn’t the speaker turned up?

-He _________ the flight. I’ll find it out at once.

A. must have missed　　　　　　　　　　　　　 B. might have missed

C. would have missed　　　　　　　　　　　　 D. could have missed