2. 外语
  3. As you worked late last night, you ______ have come this morning.

As you worked late last night, you ______ have come this morning.

admin2013-04-22  31
问题 As you worked late last night, you ______ have come this morning.
选项 A、needn’t
B、shouldn’t
C、can’t
D、mustn’t
答案A
解析 情态动词接完成体的用法。“needn’t +have done”表示“本不必做的事情却做了”。A符合句意。shouldn’t have done表示“本不应该做的事却做了”；can’t have done则表对过去事情的否定推测，译成“不可能做过某事”：没有mustn’t have done的形式。
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