1 . —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

2 . Peter ________ just a moment ago. His coffee is still warm.

A．must have left	B．should have left
C．ought to have left	D．need have left

3 . The ground is wet. It ________ have rained last night.

A．will

B．must

C．should

D．may

5 . Peter         too far. His coffee is still warm.

A．mustn't have done	B．might have gone
C．can't have gone	D．needn't have gone

6 . It _____ have rained last night, because the ground is wet now.

A．could

B．should

C．must

D．need

7 . —May I speak to Kate, please?
—Kate? You _____ have dialed the wrong number. We’ve got no Kate here.

A．would

B．might

C．should

D．must

8 . He plays basketball very well. He_________ it a lot.

A．may practise	B．must practise
C．must have practised	D．should have practiced

9 . How fantastic his spoken English is! He_____ abroad for several years.

A．may stay

B．must have stayed

C．can stay

D．must have been staying

10 . —You look so tired. You________ late last night.
—Yes. I had to to do an important report and stayed up till I completed it.

A．should sleep	B．must sleep
C．should have slept	D．must have slept