1 . Harry is feeling uncomfortable. He _______ too much at the party last night.

A．could drink	B．should drink
C．would have drunk	D．must have drunk

3 . I was on the highway when this car went past followed by a police car. They ______ at least 150 kilometers an hour.

A．should have been doing	B．must have been doing
C．could have done	D．would have done

4 . Directions: This part consists of ten sentences. In each sentence, there is mistake.
You may have to change a word, add a word or delete a word. Mark out the mistakes and put the corrections in the blanks provided.
1. Who may it be at the door? ______
2. The little girl dares not go out alone at night. ______
3. Sorry, I'm late. I should have turned off the alarm clock and gone back to sleep again. ______
4. The blackboard is clean, and everything is in good order. The classroom must be cleaned. ______
5. A left-luggage office is a place where bags should be left for a short time, especially at a railway station. ______
6. My sister met him at the Grand Theatre yesterday afternoon, so he mustn't have attended your lecture. ______
7. You can't imagine that a well-behaved gentleman might be so rude to lady. ______
8. It has been announced that candidates can remain in their seats until all the papers have been collected. ______
9. There mustn't be any difficulty about passing the road test since you have practiced a lot in the driving school. ______
10. Tom, you needn't leave all your clothes on the floor like this! ______