题目内容：

— Yes.He came here for his dictionary.
A.what did he come here for B.when he came here
C.why he came here D.how he came here
这题答案是C 为什么A不可以呢?
—Do you know _____________?

优质解答

A中若改为what he came here for就可以选,这里是一个复合句,问句里包含的第2个问句应采用陈述句形式,不用把助动词或be动词放在前面的倒装形式