题目内容
Don’t be afraid of asking for help ___________ it is needed.
A. unlessB. sinceC. whenD. although
C
【解析】
试题分析:A. unless除非,如果不,B. since既然,自从,C. when当…时候,D. although虽然,句意:当有需要的时候,不要害怕求助。所以选C。
考点:考查连词辨析
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