【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(lái)沒(méi)有必要打掃的，我自己能夠?qū)Ω�。needn’t have done：過(guò)去本來(lái)沒(méi)有必要做而做了；shouldn’t have done：過(guò)去本來(lái)不應(yīng)該做而做了。故選B

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