题目内容

Everyone passed the exam.It _________ difficult.?
A．can’t have beenB．must have beenC．couldn’t beD．might have been?
A
略
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It has been announced that all the students ______ put on the masks before going to school in case they are infected with SARS virus.
A．shallB．willC．needD．may
The meeting is not over, and you____ not leave.
A．willB．shallC．mayD．need

“Shall I come tomorrow ？” “I’d rather you ______.”
A．won’tB．didn’t
C．don’tD．wouldn’t

You        fail to pass the entrance examination if you don’t study harder.
A．shallB．couldC．mustD．should
 Jenny ______ with him at that time, for I was having dinner with her in my home.
A．can’t have beenB．mustn’t have been
C．must beD．may be
She thinks she can get there on time, ________ she?
A．canB．doesn'tC．can'tD．does

－Mary didn’t turn up last time, did she?
－No. She ______ . We had changed our plan.
A．shouldn’t have comeB．needn’t have to come
C．didn’t need to comeD．needn’t have come

“Why didn’t she come to the meeting yesterday？” “I’m not so sure. She ______ ill.”
A．should beB．should have been
C．must beD．might have been

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