The water supply has been cut off temporarily because the workers ____ one of th
题型：不详难度：来源：
The water supply has been cut off temporarily because the workers ____ one of the main pipes.| A．had repaired | B．have repaired | C．repaired | D．are repairing |
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答案
| D |
解析
句意：“临时切断了水的供给，因为工人正在修理一个主管道。”A表示“过去的过去”，一定要有一个过去的时间做对比，不能单独使用，故不能选A；B现在完成时，表示“过去一个动作对现在的影响或过去一个动作一直持续到现在还有可能再继续下去”，一定和现在有关；在这里，没有表示repair的影响，也没有表示时间的蕴含；C过去时态，单纯的过去，和现在没有关系，不会题意；D现在进行时，说话时正在进行的动作。
【考点定位】考查时态的用法。时态要注意关注语境和时态的基本用法。尤其要注意现在完成时和过去完成时，前者一定和现在有关系，后者是过去的过去，一定要有一个过去的时间作对比。 |
举一反三
We very early so we packed the night before.| A．leave | B．had left | C．were leaving | D．have left |
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---Where are your parents?
---They are in the kitchen, they ______the dinner for the party the whole day.| A．are preparing | B．have been prepared | | C．have been preparing | D．were preparing |
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—Mr. Hu, have you finished correcting the papers?
—Not yet, the papers _______. You _______ get the results from me by tomorrow.| A．are corrected; will | B．are being correcting; should | | C．are being corrected; shall | D．are being corrected; would |
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--- You have made a promise to go with me to Nanjing. So why aren’t you getting ready?
--- But I ________ that you wanted me to start at once. | A．haven’t realized | B．hadn’t realized | C．didn’t realize | D．don’t realize |
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--- Tommy is planning to buy a car.
--- I know. By the time he returns from abroad, he ________ enough for a used one.| A．will have saved | B．saves | C．had saved | D．will save |
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