Question

【题目】Mike ______ a lot of work for the poor areas since he worked in Africa.

A. does B. did C. has done D. will do

Answer 1

【答案】C

【解析】句意：自从迈克在非洲工作以来，已经为那个地方做了大量的工作。since he worked in Africa.表示的是到目前为止的时间段，主句应该用现在完成时态表示，故答案为C。