Is this the reasonat the meeting for his carelessness in his work? A. he explained   

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

A. he explained                 B. what he explained

C. how he explained             D. why he explained

答案

【解析】A。考查先行词reason后定语从句关系词的选用。分析句子结构可知, the reason后的定语从句中动词explained缺少宾语, 故用thatwhich引导, 而不用why; 又因为关系代词充当宾语时可以省略, 故选A

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