----Catherine,Ihavecleanedtheroomforyou. ----Thanks.Yo...

问题详情：

 ----Catherine, I have cleaned the room for you.

  ---- Thanks. You _______ it. I could manage it myself.

A. needn’t have done        B. needn’t do         C. mustn’t do        D. shouldn’t have done

【回答】

A

知识点：虚拟语气与情态动词

题型：选择题