1 . I can’t find my wallet now. I________ it in the bus just now, but I’m not sure.

A．should leave	B．could have left
C．must have left	D．might leave

2 . Mr. Smith ________________ (不可能去日本了), for I attended his lecture this morning. (根据汉语提示完成句子)

3 . Mary ________ my letter; otherwise she would have replied before now.

A．couldn’t have received	B．ought to have received
C．needn’t have received	D．shouldn’t have received

4 . The ground is rather wet, so it ______(rain) last night. （所给词的适当形式填空）

5 . During our trip to the Great Wall last week, I couldn’t stop thinking about how huge a project it ________ have been to build it in ancient times.

A．must

B．could

C．should

D．need

6 . With the loss of blood, he couldn’t __________ (survive) for very long after being shot. (所给词的适当形式填空)

7 . I dare ________ that without your help, we ________ so much progress in our work.

A．say; can’t make	B．to say; couldn’t make
C．say; couldn’t have made	D．to say; shouldn’t have made

8 . I have lost my wallet. I ________ it somewhere just now.

A．must drop	B．must have been dropped
C．must have dropped	D．should have dropped

10 . 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