题目内容
3.-Sorry,Professor Smith.I didn't finish the assignment yesterday.-Oh,you have done it as yesterday was the deadline.( )
A. | must | B. | mustn't | C. | should | D. | shouldn't |
分析 句意--对不起,史密斯教授,我昨天没有完成作业.--噢,你应该完成的,因为昨天是截止日期.
解答 答案C. must have done"过去肯定做了某事.mustn't 禁止,不允许,不用于推测.should have done"本应该做某事而没做";shouldn't have done"本不应该做某事而做了".根据句意,因为昨天是截止日期,你应该完成的却没完成,故选C.
点评 本题是基础题,考查情态动词+have done 的用法,并需要结合具体的语境,选择出正确选项.
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