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—Catherine, I have cleaned the room for you.

—Thanks. You____ it, I could manage it myself.

A. needn’t do B. needn’t have done

C. mustn’t do D. shouldn’t have done

 

B

【解析】

试题分析:考查情态动词。句意:--凯瑟琳,我已经帮你打扫房间了。--谢谢,你本来没有必要这样做的,我可以自己打扫的 。A. needn’t do现在或将来不需要做 B. needn’t have done以前本来不需要做C. mustn’t do 禁止做某事 D. shouldn’t have done本来不应该做而做了,根据句意故B正确。

考点:考查情态动词

 

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