I don't know __.A.the reason why can be B.why the reason may beC.what theIs Mr.Wu from Beijing?I don't know ________.A.where does he come from B.from where does he comeC.which city he comes from D.what city he comes from 为什么不选DI 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

因为未被选为满意答案，故删去原回答内容，统一操作望谅解

I don't know what the reason can be. /I don't know why.
which city he comes from
选C
D虽然没有语法错误，但是意思不如C好

which是特指，what泛指

I don't know __.A. the reason why can be B. why the reason may beC. what the
D.what the reason may be 最佳答案。

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
这个可以选D。 AB肯定不对，
C 也不如D更好。Which有在特定几个中选择的意思。

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