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I think you could complain, ___, of course, you are happy with the way things are.

A. when B. if

C. unless D. while

 

C

【解析】

试题分析:句意:当然,我想如果你对于这件事不满意你可以投诉。句中of course为插入语,这里缺少连词:unless除非,如果不,A. when 当…时候,B. if如果,D. while然而,根据句意选C。

考点:考查连词

 

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