Who is the man?—Oh,he's the teacher _ gave us a speech.

问题描述:

Who is the man?—Oh,he's the teacher _ gave us a speech.
答案是Who
为什么不能用which呢 不是说他是给我们做过演讲的老师么不是指名他是个干嘛的老师么which哪不对了

which修饰的是物本题先行词是人the teacher3Q