1 . I ______ you about your mistakes, but I didn’t think you would listen to me.

A．could have told

B．must have told

C．should tell

D．might tell

2 . There was no one else in the classroom, so he ______ it by himself.

A．should have done

B．need have done

C．must have done

D．could have done

3 . During our trip to the Great Wall last week, I couldn’t stop thinking that building it ________ have been a huge project in ancient times.

A．should

B．must

C．could

D．need

5 . —The woman biologist had stayed in Africa studying wild animals for 13 years before she returned.
—Oh dear! She ________ a lot of difficulties!

A．may go through	B．must have gone through
C．should have gone through	D．might go through

6 . I believe he ________ an accident, otherwise he ________ have arrived on time.

A．might have；would

B．should have had； should

C．could have； should

D．must have had； would

7 . —The woman biologist stayed in Africa studying wild animals for 13 years before she returned.
—Oh, dear! She ______ a lot of difficulties!

A．may go through	B．might go through
C．need have gone through	D．must have gone through

8 . 我想她最近肯定没有收到过侄子的来信。(hear)

9 . I appreciate your kindness very much, but you________ have bought such an expensive present.

A．needn't

B．mustn't

C．wouldn't

D．couldn't