20. Could you tell me _______ yesterday?

　　　 A why did you come late　　　　　 B why you came late

　 C why do you come late　　　　　 D why you come late

19. All the students stopped ________ when the teacher came in.

　　　 A. talk　　　　　　 B. to talk　　　　 C. talking　　 D. talked

18. The trees must _______three times a week. 　　　 A. water　 B. watering　 C. be watered　 D.waters

17. Not only Mary but also I _______ from Canada.

　　　 A. is　　　　 B.　 are　　　　　　 C. am　　　　　 D. was

16.The number of the students in our school ______ 2009,but a number of students _____ live in the school.

　　　 A are, don’t　 B is, doesn’t　 C is, don’t　　 D are , doesn’t

15. Every day we spend much time __________ our homework.

　　　 A. did　　　　　　 B. to do　　　　 C. do　　　　 D. doing

14. The boy was seen ______on the sports ground.

　　　 A. to play　　　　 B. play　　　 C. played　　　　 D. to playing

13. Keys _______ used for ______ the doors.

A. is, opening　B. is, opened　 C. are, opening　 D. are opened

12. To buy CDs , I ________ my money.

A. run out　　 B. ran out　　 C. ran out of　　　 D. run out of

11. When ______ the bridge ________?

A. did, build　 B. was, built　 C. does, build　 D. were, built