I got up early that morning, but I _____ so because I had no work to do.A．mustn’
题型：不详难度：来源：
I got up early that morning, but I _____ so because I had no work to do.| A．mustn’t have done | B．didn’t need to do | C．needn’t have done | D．can’t have done |
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答案
| C |
解析
| needn’t have done表示“过去不必做而做了某事”，若表示“不必做某事（且实际上未做）”则用“didn’t / don’t / doesn’t need to.” |
举一反三
I missed the last bus, so I _____ go home on foot.| A．must | B．have to | C．may | D．had to |
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He ought to win the first prize, _____ he?| A．oughtn’t | B．shouldn’t | C．mustn’t | D．both A and B |
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Everyone _____ do his best for the modernizations of our country.| A．can | B．may | C．should | D．might |
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Let’s clean our classroom, _____?| A．will you | B．don’t we | C．shall we | D．do you |
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Let us play basketball, ______?| A．will you | B．don’t we | C．shall we | D．do you |
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