We _______ on it for several hours but we have not yet reached any conclusion.A．
题型：不详难度：来源：
We _______ on it for several hours but we have not yet reached any conclusion.| A．work | B．areworking | C．havebeenworking | D．havebeenworked |
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答案
| C |
解析
答考查时态。根据but后时态，可以判断出到现在还没有得出结论，有可能还要继续下去，所以要现在完成进行时。 |
举一反三
—May I speak to your manager Mr.Williams at five o’clock tonight?
—I’m sorry. Mr. Williams ________ to a conference long before then.| A．will have gone | B．had gone | C．would have gone | D．has gone |
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His letter was especially welcome as I ____ from him for long.| A．haven’t heard | B．would not heard | C．hadn’t heard | D．didn’t heard |
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I want to buy that kind of cloth because I _____ the cloth _____ well.| A．have been told; washes | B．have told; washes | | C．was told; washed | D．have been told; is washed |
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The Anti- Japanese War ________ in 1937 and it ________ eight years.| A．broke out; lasted | B．broke out; was lasted | | C．was broken out; lasted | D．was broken out; was lasted |
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It has been raining for a day, but even though it hadn’t rained, we ________ there by tomorrow. | A．can’t get | B．won’t get | C．hadn’t got | D．wouldn’t get |
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