3.Food ________ in a cool place in summer.

A. must keep　 B. mustn’t keep　 C. must be kept　　 D. mustn’t be kept

2.The workers were made ________ ten hours a day.

A. work　　　　 B. to work　　　　 C. working　　　 D. worked

1.The reading room ________ yesterday afternoon.

A. cleaned　　　 B. is cleaned　　 C. was cleaning　 D. was cleaned

10．　 The student should learn all the texts by heart.

Ⅱ.选择填空:

9．　 　Who is repairing the bike?

8．　 　You must turn off the light before you go to be.d

7．　 　We often see him help his classmate.

6．　 　Have they posted the letter yet?

5．　 　Will they show a new film next week?

4．　 　I saw the boy enter the room.