BE QUICK!
问题描述：
BE QUICK!
11.There are three libraries in our school,_____ were built five years ago.
A.all of them B.either of them
C.all of which D.both of that
答
选择c了
首先前一个半句子里有are了,后一个句子有were 都是谓语动词了,所以后面的该是从句了 排除了a和b
又因为是3个图书馆,排除了d
所以选择c了