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— Why do you do volunteer work in the North-West?
— I___ to improve the lives of the children there through my efforts．
A．was tryingB．have tried
C．am tryingD．tried
C

試題分析：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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