do you know which gate we have to go through Gate 818.A.

问题描述:

do you know which gate we have to go through Gate 818.A.
--- Do you know ____
--- Gate 818.
A.what gate we will have to go through
B.which gate we will have to go through

答案确实是B.相信你知道正确答案是它.
那就说说A吧:因为Gate有多个,这个已经有个“范围”的概念在里面了,在一定范围内进行选择,根据which的用法,答案A.
eg:Which pen is the best?正确
What pen is the best?错误
仔细体会吧.