the book about ______the boys are talking is very interesting.为什么_英语解答

the book about ______the boys are talking is very interesting.
为什么这里要用which,用that 为什么不行?

人气：442 ℃　时间：2020-02-03 04:01:49

解答

which从句做主语时,which在从句中的成分大多是修饰,定语的成分.