Our department has a large collection of books,__ are in English.

问题描述:

Our department has a large collection of books,__ are in English.
Amany ofwhichB many of themC many ones Dthier many
求正确答案及详细解析

选A 非限制性定语从句 which指代逗号前的BOOKS
我们单位有很多书,大多数都是英文的.