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Is this the reason at the meeting for his carelessness in his work?

A. what he explained B. how he explained

C. he explained D. why he explained

 

C

【解析】考查定语从句。句意: 这是他在会上为他工作中的粗心大意所解释的原因吗? 根据句意这里需要一个定语从句, 修饰先行词the reason。在定语从句中先行词the reason作explained的宾语, 用关系代词that或which, 也可省略; how, why都是关系副词不符合, what不作定语从句的关系词, 排除A、B、D。故选C。

 

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