7．He seemed _______(worry) about something.

6．The bus stopped _______(pick) up passengers.

5．______ (rest) well is necessary for health.

4．It is difficult _____(decide) what _____(do).

3．My little brother is too young _____( dress) himself.

2．He is very strong. He will be able _____(work) for another hour.

1．You^’d better _____(have) your hair cut.

15.----Amy! Did you have a good time in the park?

　 　　----Yes, but I really ______ because I had a lot of things to do.

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

　　 用不定式的适当形式填空：

14．Don’t be anxious. You ______ get the answer right this afternoon.

　　 A. shall　 　　　　　　 B. must　　 　　　　　 C. are able to　　 　 D. would

13．All the goods have been delivered in a good ______.

　　 A. condition　　 　 B. situation　 　　　 C. state　　 　　　　　　　　　 D. time