1. What _______ your brother _________ (do) at that time? He ___________ (play) the piano.

　　2. Why ________ they __________ (not go) to see the play yesterday? Because they _________(see) it before.

　　3. Two thieves _____ (break) into his house last night and _______ (take) away some money.

　　4. ________ you _________ (visit) the Summer Palace? Yes, we ________. When ________ you_________ (visit) it? Last term.

　　5. If it ________ (not rain) next Sunday, we’ll have a football match on the playground.

　　6. While my father ______ (read) newspapers, my sister and I ______ (prepare) our lessons.

　　7. The child suddenly ________ (fall) to the ground when he _________ (cross) the street.

　　8. As soon as he __________ (come), I’ll give the note to him.

　　9. Don’t make any noise! Grandma ____________ (tell) us an interesting story.

　　10. My parents __________ (not be) in. They __________ (go) shopping. They ___________(be) back in an hour.

　　11. Nothing can make us _________ (turn) against our country.

　　12. If you don’t hurry, you _________ (be) late for the meeting.

　　13. I _________ (not have) my breakfast today. I _________ (be) so hungry now.

　　14. How many English words ________ he ________ (learn) before he went to college?

　　15. Tom ________(be) always the first one __________ (get) up his family.

　　16. I don’t know when the meeting ________ (begin). But I’m sure it _________ (begin) as soon as the headmaster _________ (come).

　　17. What _______ they ________ (do) from eight o’clock to nine o’clock last night? They_________ (make) a model plane.

　　18. I received his letter yesterday. I _________ (not hear) from him since he went to America.

　　19. He ________ (see) the play last night. But his brother _________ (not see) it, because he ___________ (see) it before.

　　20. Mike _________ (live) for five years in that city since he began to work there.

　　答案：

　　1. was; doing; was playing

　　2. didn’t; go; have seen

　　3. broke; took

　　4. Have; visited; have; did; visit;

　　5. doesn’t rain

　　6. was reading; were preparing

　　7. fell; was crossing

　　8. comes;

　　9. is telling

　　10. aren’t; have gone; will be

　　11. turn

　　12. will be

　　13. didn’t have; am

　　14. had; learnt

　　15. is; to get

　　16. begins; will begin; comes

　　17. were; doing; were making

　　18. haven’t heard

　　19. saw; didn’t see; has seen

　　20. has been living