1. If you _____________(give) up smoking and drinking ,your health will improve soon.
2. The last half of the nineteenth century _______________(witness) the steady improvement in the means of travel.
3. They fulfilled the plan earlier than they_____________(expect).
4. Turn on the television or open a magazine and you _______________(see) advertisements showing happy, balanced families.
5. The project to clear up the polluted river ___________（complete）by the end of next year.
6.The speech__________(deliver),a lively discussion started.
7. She _____________(award)a medal for her bravery.
8.The thief __________(catch) while climbing over the garden wall.
9. The washing machine needs______(repair) before it can be used.
10. More than two thousand residents were reported to be killed or ___________(miss) in Yushu earthquake.
11.You won’t know if it fits you until you ____________(try) it on.
12. It seems oil ____________(leak) from this pipe for some time. We’ll have to take the machine apart to put it right.
13. Great as Newton was, many of his ideas________________(challenge) today and are modified (修正) by the work of scientists of our time.
14.Jone told Mary that he _________(ask) what he was doing during the holidays.
15. Your hair wants___________(cut). You’d better have it done tomorrow.
16.The student studies hard, but sometimes he __________(have） trouble with English.
17.By the time he retires, mu father__________(work) for almost forty years.
18. By the time he left school, he __________(teach) that course for ten years.
19. It’s reported that by the end of last month the sale of the company ____________(rise) by 10%.
20. Bill ____________(offer) a job in a factory, but he refuses to take it.
21. While we boys were working hard in the garden, our sisters ____________(enjoy) themselves in the sitting room.
22. A lot of buildings _____________(build) and the place ______________(become) very noisy ever since we moved here.
23. Jone and I ______(be） friends for 8 years. We first got to know each other at a party. But we_______(see）each other a couple of times before that.
24.It is said that she_____(employ) in a computer company since graduation.
25. We __________(take) a walk when it started to rain.
26. I think much attention ______________(must, pay) to your pronunciation.
27. I made a telephone to my son and he told me he ___________(go) back home this weekend.
28. The air will be fresh and clean if we ___________(get) rid of pollution.
29. His bike ___________(damage) badly. The worker ______________(repair）it now.
30. When you phoned me yesterday evening, I _________just_______(finish) the housework and was starting to take a bath.
31.By the time we got to the cinema, the film ______________(begin) for half an hour. A. has begun B. had begun C. has been on D. had been on
32. ---My sister finished school three years ago.
----- What ____________(do) these years?
33. The work ____________(do) by the time you get there.
34. She was told the examination______________(give) on Friday.
35. Most environmental problems exist because adequate measures for preventing them ______________(not, take) in the past.
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