We have two spare rooms,____has been used for more than two months.

问题描述:

We have two spare rooms,____has been used for more than two months.
A.but neither of which B.none of which
C.but neither of them D.none of them
应该选那个选项?请说明一下理由.THANKS~

c
因为是两个房间,所以用neither
用了but,就是两个简单句的组合,所以不用which做从句