1 . I_________ (go)through that bitter period without your generous help. （所给词的适当形式填空）

2 . He        have watched TV at home for 1 saw hint in the classroom.

A．shouldn’t

B．couldn’t

C．mustn’t

D．may not

3 . When       if he had any idea what the novel was about, Jack kept silent.
He      have read it very carefully.

A．asking; needn't	B．asking; shouldn't
C．asked; can’t	D．asked; mustn’t

4 . He ________ without saying goodbye to them, for he always has good manners.

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

5 . John ___ such a thing about you. He never speaks ill of you behind your back.

A．can’t have said	B．might not have said
C．couldn’t say	D．mustn’t have said

6 . It rained a lot during their journey, so they________have had a good time.

A．can’t

B．must

C．shouldn’t

D．might