【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】“needn't have+v.-ed形式”表示“(過去)沒有必要”,“I could manage it myself”表明沒有必要幫助把房間打掃干凈。

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