Question

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

Answer 1

C

解析试题分析：句意：这就是那个你在会上解释的工作上粗心的原因吗?reason作先行词时，如在定语从句中作状语，用why引导定语从句；如果作主语或宾语，则用which/that引导定语从句。在这个题目中reason作宾语，因此，省略连接词which/that。What不能引导定语从句；根据句意故选C。
考点：考查定语从句的用法。