【題目】—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

【答案】B

【解析】

試題分析:句意:—?jiǎng)P瑟琳,我已經(jīng)給你打掃了房間!x謝。你本來沒有必要打掃的,我自己能夠?qū)Ω丁eedn’t have done:過去本來沒有必要做而做了;shouldn’t have done:過去本來不應(yīng)該做而做了。故選B

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