Question

【题目】----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

Answer 1

【答案】A

【解析】

试题分析：考查固定用法。根据句意可知Catherine对对方为她打扫了房间表示感谢并提到对方本来不必为她打扫房间。很显然对方打扫房间是过去所为，表达“去不必做某事”用needn’t have done sth.