— 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

 

C

【解析】

試題分析：考查時(shí)態(tài)。句意：--你為什么選擇去西北地區(qū)做志愿服務(wù)？--通過我的努力，我正在努力改善那里孩子們的生活。過去進(jìn)行時(shí)用來指過去的某個(gè)時(shí)刻正在發(fā)生的事情，根據(jù)第一句中的Why do you...可知，這里不用過去的時(shí)態(tài)，排除A、D；現(xiàn)在完成時(shí)表示發(fā)生在過去的事情對(duì)現(xiàn)在造成的結(jié)果，參加志愿服務(wù)這件事并未結(jié)束，因此不用現(xiàn)在完成時(shí)，故選C。

考點(diǎn)：考查時(shí)態(tài)

 

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