—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】

試題分析：考查情態(tài)動詞。句意：--凱瑟琳，我已經(jīng)幫你打掃房間了。--謝謝，你本來沒有必要這樣做的，我可以自己打掃的 。A. needn’t do現(xiàn)在或?qū)聿恍枰? B. needn’t have done以前本來不需要做C. mustn’t do 禁止做某事 D. shouldn’t have done本來不應(yīng)該做而做了，根據(jù)句意故B正確。

考點：考查情態(tài)動詞

 

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