Have you asked him the reason ____may explain his success.A.why B.that C.for which D.what尽量详细点,最好把其他的选项也解释下, 英语
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【答案】 the reason 先行词
A,the reason why .原因 固定句式 易误选
B正确 定语从句 缺主语
C可以是the reason for which he may explain his success 少主语
Dwhat不能引导定语从句 追问： why =for which?我记得老师说是关系副词，那·关系副词是什么？ 追答： 引导修饰句子的都叫关系副词，放在先行词之后可做补充和解释说明why， for which 都是关系副词