—Sorry, Professor Smith. I didn’t finish the assignment yesterday. —Oh, you______have done it as yesterday was the deadine.

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问题 —Sorry, Professor Smith. I didn’t finish the assignment yesterday. —Oh, you______have done it as yesterday was the deadine.

选项 A、must
B、mustn’t
C、should
D、shouldn’t

答案C

解析 答句句意:哦,你本该做完的,因为昨天是最后期限。此处用should have done表示“本该做某事而实际上未做”。
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