Question

【题目】My sister plenty of volunteer work in the past seven years.

A. does B. is doing C. has done D .had done

Answer 1

【答案】C

【解析】

试题分析：句意：我的妹妹在过去的7年里做了许多的志愿工作。根据语境可知用现在完成时，其结构是have done的结构。故选C。