高中英语填空

问题描述:

高中英语填空
1.Who was the girl _____ he talked with just now?
2.The old man ______ our teacher is talking to is our new headmaster.
为什么第一句只能填that,而第二句能填that/who/whom?

两句均为定语从句.
但是,1.题中前面有who,后面为了避免重复,所以用that.
同理,如果,第2.题中,开头的The,换成that的话,后面的空就只能填who/whom.
都是为了避免重复.