专四

单选题__________ I sympathize, I can't really do very much to help them out of the difficulties.

A.As long as 
B.As 
C.While 
D.Even

参考答案:C进入在线模考
【译文】尽管我很同情他们,但要帮助他们摆脱困境,我确实帮不上什么忙。
【解析】引导让步状语从句的连词用法。while引导让步状语从句的意义相当于although,但while 让步分句只能位于旬苗。As long as和As都不能用来引导让步状语从句;even不是连词,如改为even if则可选。

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