时态语态课堂练习（二）
1．You _____where you leave your briefcase.
a. were always forgetting b. are always forgetting
c. have always forgotten d. will always forget
2. ---I’d like to know whether the contract with us has been drawn up yet.
---It _____at the moment, Sir.
a. has been drawn up b. is drawing c. is being drawn up d will be drawn up
3. If you apply for the position, the form _______be filled and returned within two days.
a. is about to b. is going to c. has been to d. is to
4. ---How many times______ you not to play with fire?
---Sorry, I won’t do so any longer.
a. had I warned b. have I warned c. am I warning d. did I warn
5. Doctors say it ______many years before scientists ______an effective treatment for AIDS.
a. is; develop b. is; will develop c. will be; will develop d. will be ; develop
6．He _____after most of the guests _____their leave.
a. had stayed; took b. stayed; took c. stayed; have taken d. had stayed; had taken
7． The spacecraft _____in space for seven days, but the flight lasted only 74 seconds before it exploded.
a. remained b. was to remain c. had remained d. was remained
8. We ______you for delivering goods to your door as long as you’ve paid in advance.
a. won’t charge b. didn’t charge c. hadn’t charged d. haven’t charged
9. In recent years, many people _____the safety of blood in blood banks.
a. have become concerned about b. have concerned about
c. became concerned about d. have become concerning about
10． Over the past few weeks barely a day _____without a vehicle breaking down on the rough road.
a. went by b. goes by c. has gone by d. hasn’t gone by
11． So far his scientific team _____little evidence to suggest that the caves might be dangerous.
a. has produced b. produced c. hasn’t produced d. did not produce
12. Since the drought began many farmers _____one harvest after another, unable to plant wheat on the land.
a. have been missed b. are missing c. have missed d. missed
13 This is the second time we ______improvements in that machine.
a. have made b. will make c. make d. are making
14． The old lady _____her husband that she _____nearly half of their savings into the stock market.
a. hasn’t told ;had sunk b. didn’t tell; had sunk
c. hadn’t told ; sank d. doesn’t tell; had sunk
15．Growing evidence suggests that women ______to have sleep problem.
a. should be more likely b are more likely c. will be more likely d. is more likely
16．We are faced with the conclusion that during the past three decades the storm ______almost
Twice as destructive.
a. have been grown b. have grown c. are growing d. are being grown
17．Scientists have known about the link between smoking and lung cancer for decades, but cigarette use _______.
a. is hardly decreased b. is hardly decreasing c. has hardly decreased
d. was hardly decreasing
18． The largest bears in the mountain areas _____nearly 10 feet tall.
a. are stood b. stand c. are standing d. have stood
19． Almost all the researchers ______that human activity _____climate in a visible way.
a. persuade; is altering b. are persuaded ; is altering
c. persuade; has altered d. are persuaded has been altered
20．The atmosphere’s carbon dioxide level_____by some 30 percent since 200 years ago.
a. has risen b. is rising c. rose d. has been risen
21． What he is basically doing now is continuing what he ______as far back as he can remember.
a. is doing b. has done c. will do d will have done
