It took me a long time before I was able to fully appreciate what they ______ for me.A.had doneB.did

题目简介

It took me a long time before I was able to fully appreciate what they ______ for me.A.had doneB.did

题目详情

It took me a long time before I was able to fully appreciate what they ______ for me.
A.had doneB.didC.would doD.were doing
题型:单选题难度:中档来源:不详

答案

A
考查时态。从句的动作发生在谓语动词之前,题中谓语动词为took,“过去的过去”应用过去完成时态。故选A。

更多内容推荐