急 当定语从句里出现两个介词时 把哪个介词提前?

题目

急 当定语从句里出现两个介词时 把哪个介词提前?
新概念124课C部分练习题
例：This is the test.I spoke to you about it.
改为:This is the test about which I spoke to you.
为什么不是This is the test to which I spoke you about it.

答案

因为这里的which指代的是test这个词,而不是you这个词.其实,第一句的it是不需要的.This is the test is spoke to you about.就可以了.在定语从句里面,which本身也是句子的一部分,比较要有这个which,句子才是完整的.你...