题目内容：

____ did he wait there that day?
where
until when
whom
by whom

优质解答

B
已经有个there 就不用再选where了,因为已经有了地点庄语了
如选c,题中wait 后应该要加上个for,wait for sb
最后一个是被动语态,如选这个的话题目中的did he wait应该改称was he waited应该是陪他等的是谁的意思.