B. should have shut
C. ought have shut
D. can have shut
6. The little girl had better not stay up too late, ___________ she?
A. does B. will C. had D. has
7. This is a very important project,so you _______ plan it very carefully.
A. ought to B. will
C. dare D. need
8. You had better ________ football near the street,its very dangerous.
A. not to play B. dont play
C. not play D. to not play
II. 在下列各句的空白处填上适当的情态动词,每空一词。
1. Excuse me, may I sit here?
Im afraid you ________ ________ not, because someone has taken it.
2. Tom,you __________ have left home without telling your parents yesterday afternoon.
3. You _________ __________ have bought that book. It is so good.
4. I think you should be careful in all your work, ____________ you?
5. Your sister ought to put her heart and soul into her study, _____________ she?
答案:
I. 1. B 2. A 3. C 4. C
5. B 6. C 7. A 8. C
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