He______the job well, but he______so careless.A．had done; had been B．could do; w
题型：不详难度：来源：
He______the job well, but he______so careless.| A．had done; had been | | B．could do; was | | C．could have done; was | | D．hadn’t done; had been |
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答案
| C |
解析
| 选C。答题的关键在于抓住句中的but，but后面的句子是对过去事实的陈述，应用一般过去时；前面的句子则表示“本来能够……”，是对过去事情的推断，因此应用could have done，句意为“他本来能够做好那工作，但他太粗心了。” |
举一反三
It is strongly suggested that measures
students to cheat in the exams.| A．be taken to prevent | | B．be taken to forbid | | C．are taken to prevent | | D．are taken to forbid |
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—I’m thinking of losing weight these days.
—Oh, you ______ be out of your mind. You’re 50 kilograms at the most!| A．will | B．should | C．may | D．must |
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Zhang Lin was addicted to computer games during his last year in high school , otherwise he ____________a student of Beijing University .| A．would have been | B．should be | C．has been | D．had been |
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---Your sister nearly _______ all her spare time to her study during the three years.
----That"s right， or she ________ the first place in her school in the College Entrance Examination. | A．devoted; wouldn"t have taken | B．spent; wouldn"t have taken | | C．had devoted; hadn"t taken | D．had spent; couldn"t take |
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—Any information about your son?
—No. If only I ______ those tough words to him.| A．didn"t say | B．hadn"t said | | C．shouldn"t have said | D．couldn"t have said |
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