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問題詳情:
—You know that you were driving at 100 kilometres per hour, don't you?
—No, officer, I ________have car can't do more than 80.
A.mustn't B.shouldn't
C.may not D.couldn't
【回答】
D [couldn't have done是對過去的否定推測。]
知識點:情態動詞
題型:選擇題
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