Jack could have avoided that terrible car accident, but he ________ careful eno
题型：不详难度：来源：
Jack could have avoided that terrible car accident, but he ________ careful enough.| A．is not | B．hasn’t been | C．was not | D．hadn’t been |
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答案
| C |
解析
这题考查时态，句意是：杰克本来可以避免这场可怕的车祸，但是他太不仔细了。从could have done看出是“过去本可以做…却没有做”，那不够仔细是过去的事实，所以选C |
举一反三
---- How could I thank you enough?
----Don’t mention it. Any other man ________ that.| A．would | B．will do | C．would have done | D．had done |
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---- Would you like to go travelling with me to New York, Benjamin?
---- Sorry, I’m busy, for the final examination is coming. So I ____________ hard throughout the next several weeks.| A．have worked | B．have been working | C．work | D．will be working |
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—Did you hear about the air crash? I feel so lucky!
—Yes．If you _____ that flight, I _____ speaking to you now．| A．were taking; wouldn"t be | B．took; wouldn"t have been | | C．had taken; wouldn"t be | D．had taken; wouldn"t have been |
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— Did you regret having left your well-paid job?
—Why should I? I _______ as much, but I enjoy my present one more.| A．didn’t earn | B．don’t earn | C．hadn’t earned | D．haven’t earned |
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What do you guess our friend Bob when we get to his home? | A．does | B．would do | C．has been doing | D．will be doing |
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