4. –Do you like the flower?

　　　　　　　 -Yes, it _____ sweet.

　　　　　　　 A. is smelling B. smelt C. is smelt D. smells

3. Paper _____ first invented in China.

　　　　　　　 A. is B. are C. was D. were

2. Many kinds of new bicycles _____ in Number One Machine Factory

　　　　　　　 now.

　　　　　　　 A. are making B. are made C. have made D. will make

1. The river smells terrible. People must _____ dirty things into

　　　　　　　 it.

　　　　　　 　A. be stopped to throw B. be stopped from throwing

　　　　　　　 C. stop to throw D. stop from throwing

20. We saw some boys playing football behind the house.

　　　　　　　 Some boys _____ _____ _____ football behind the house.

　　　　　　　 △ 提 高 型

19. The boss made the workers work all day.]

　　　　　　　 The workers _____ _____ _____ work all day (by the boss).

18. I’ll buy my daughter a new watch.

　　　　　　　 A new watch will _____ _____ _____ my daughter.

17. You can look up the word in the dictionary.

　　　　　　　 The word can _____ _____ _____ in the dictionary.

16. He doesn’t clean the meeting-room every day.

　　　　　　　 The meeting-room _____ _____ every day.

15. Someone took away the boxes yesterday.

　　　　　　　 The boxes _____ _____ away by someone yesterday.