题目内容

15. ―Mary broke up with me !

^You    have forgotten about the Valentine's Day.

A. shouldn't    B. couldn't

C.   needn't   D. mustn't

15.   A 考査情态动词。shouldn't have done sth本不应该做某事。句意:"玛丽和我分手了!""你本不应该忘记情人节。"couldn't have done sth不能做了某事;needn't have done

sth本来没有必要做某事。

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