I don't know __.A.the reason why can be B.why the reason may beC.what the

Is Mr.Wu from Beijing?I don't know ________.A.where does he come from B.from where does he come
C.which city he comes from D.what city he comes from 为什么不选D
该题正确答案选A.指不知道他来自哪里.
首先B是可以直接排除的,语句不通顺.
C.Which,指哪个,但是这一天已经是明确的指出了事beijing了,没有哪个比较的对象,所以不恰当.
D,what,是指什么,一般情况下,很少有这样的问法.所以可以排除.
I don't know __.A.the reason why can be B.why the reason may beC.what the reason can be D.what the reason may be
选D