Question

They held a party in the hall __________had been beautifully decorated.

()They held a party in the hall __________had been beautifully decorated.

A.which
B.where
C.in which
D.in that
请写出答案与解题思路，谢谢！

Answer 1

选A 后面从句是修饰前面hall的，不缺介词，where=介词+which，故BC不选。因为需要一个引导词引导后面的从句，故不选D，选A。

Answer 2

A， 定语从句，修饰先行词the hall

Answer 3

A，在从句中是作为主语的，只能选A。