You can’t complain about being left out ______you don’t make any effort to share your joys and sorrows with others.

A. once B. unless C. when D. though

 

C

【解析】

試題分析:句意：你不能抱怨被人冷落，既然你都不努力去和別人分享你的快樂悲傷。A一旦，曾經(jīng)；B除非；C當……時候，既然；D雖然。根據(jù)句意可知選C。

考點：考查狀語從句。

 

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