题目内容

This office is very dirty and in a mess; it ____ cleaned.

A. can't have been
B. mustn't have been
C. wouldn't have been
D. shouldn't have been

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Jeffery's score on the latest test is the highest in his class; he ____ have studied harder.

A. may
B. should
C. must
D. ought to

With piles of work on hand, she ____ to the cinema last night.

A. mustn't go
B. wouldn't go
C. oughtn't to go
D. shouldn't have gone

My classmate went to the doctor's the day before yesterday. He had to wait for an hour before the doctor ____ see him.

A. can
B. could
C. may
D. might

According to the school regulations, you ____ make a noise in the test room.

A. mustn't
B. may not
C. needn't
D. don't have to