1 . 一I think I saw Mr. Smith at yesterday's party.
一He ______ there. He is now on a business trip in Greece. And he left the day before yesterday.

A．mustn't have been	B．couldn't have been
C．might not be	D．should not be

2 . ---Here you are. This is the hotel!
--- It's so close to the station. We ____ the taxi at all!

A．might not have taken	B．couldn’t have taken
C．needn't have taken	D．mustn't have taken

3 . 他们上周不可能见过这位雕塑家，因为他昨晚才出院。 (can)

4 . My sister met him in the street yesterday afternoon, so he ______ your lecture.

A．shouldn’t have attended	B．couldn’t have attended
C．mustn’t have attended	D．needn’t have attended

5 . She ________ (participate) in the activity, for she was doing paperwork in the office then. （用适当的词填空）

6 . George can’t ________ (go) too far. His coffee is still warm. (所给词的适当形式填空）

7 . We _______ have bought so much food now that Suzie won’t be with us.

A．may not

B．can’t

C．mustn’t

D．needn’t

9 . Without your help, I _________(complete) the task on time.

10 . 选词填空
1. —Must I finish the task right now?
—No，you ________ (don’t have to/mustn’t)
2. It’s so near. We ________ have taken a taxi.(shouldn’t/can’t)
3. You ________ have spent so much time playing computer games.(mustn’t/oughtn’t to)
4. ―Shall I leave the room so that you two can talk?
―No, you ________.(mustn’t/needn’t)
5. He ________ have missed the train; he arrived atthe train station two hours earlier.(can’t/mustn’t)
6. You ________ start at once if you want to catch the bus.(have to/ought to)
7. They ________ stay in the office last night because of the snowstorm.(had to/must)
8. We _______ have helped him; in that case, he would have been able to finish the work.(should/can)
9. He finished all the work himself; in fact, he ________ have asked his friends for help.(need/could)
10. Something terrible ________ have happened if Li Chang was not coming to eat in his restaurant as he always did.(have to/must)