【題目】— Why do you do volunteer work in the North—West?

— I_____ to improve the lives of the children there through my efforts.

A. was trying B. have tried

C. am trying D. tried

【答案】C

【解析】句意：--你為什么在西北做志愿者的工作？--我在努力通過自己的努力改善那里孩子的生活。從第一句話：Why do you do volunteer work in the North-West?可知是現(xiàn)在正在做，用現(xiàn)在進行時，選C。

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