Question

【题目】It took me a long time before I was able to fully appreciate what they __________ for me.

A. had done

B. did

C. would do

D. were doing

Answer 1

【答案】A

【解析】句意：过了很长一段时间我才能完全理解他们为我所做的。本题考查动词的时态。根据语境可知整句话的时间是过去，“他们为我做的”这一动作发生在“我可以完全理解”之前，因此用过去完成时更符合题意，故选择A项。