— 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 triedC.a(chǎn)m tryingD.tried
C

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(guò)我的努力,我正在努力改善那里孩子們的生活。過(guò)去進(jìn)行時(shí)用來(lái)指過(guò)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(guò)去的時(shí)態(tài),排除A、D;現(xiàn)在完成時(shí)表示發(fā)生在過(guò)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。
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