As a graducate in computer science, he ___ to work out the problem.A．wouldn"t ha
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As a graducate in computer science, he ___ to work out the problem.| A．wouldn"t have failed | B．can"t have failed | C．mustn’t have failed | D．might not have failed |
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答案
| B |
解析
| can’t/couldn"t have done表示对过去发生的事情的否定推测。 |
举一反三
You did not go to the party yesterday, or I ___ you.| A．would see | B．could meet | C．might have seen | D．might see |
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—Did you arrive here this morning?
—Yes,it was at nine o’clock ____we came here.| A．when | B．before | | C．which | D．that |
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You____be ashamed of yourselves.You’ve created this problem.| A．have to | B．used to | | C．needed to | D．ought to |
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— Mary,how did your maths test go?
—I had thought I _____ ,but in fact I came in the top 10 in my class. | A．should have failed | | B．couldn’t have failed | | C．might have failed | | D．shouldn’t have failed |
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We _____ last night,but we went to appreciate the flowerbeds and streetlights in Tian’anmen Square instead.| A．might study | B．could study | | C．should have studied | D．must have studied |
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