英语名词性从句中什么时候用of which什么时候用of them

题目

英语名词性从句中什么时候用of which什么时候用of them
比如说这道题There were two small rooms in this flat,_____served as the kitchen.
A.the smaller of which B.the small of which C.the smaller of them D.the smaller one

答案

（1）of which 和 of them的区别主要在于：of which是在从句中.即前面一句是主句,后面也是一个句子,但是两个句子之间不是句号而是逗号.逗号后面接of which.用of which引导的后面的句子是非限制性定语从句.可以是some...