Question

He didn't forget the room,_____ he had so often been called for punishment.

A.which B. in it C.to which D.there

答案：C

麻烦解释下，谢谢。

Answer 1

the room 是非限制性定语从句的先行词，在从句中作had been called to的宾语，为了强调将介词to 提至引导词which前。for punishment 表原因。
还原后：he had so often been called to the room for punishment. 他经常被唤至那间屋子受罚。
全句翻译：他没有忘记那间屋子，他经常被唤至那儿受罚。

Answer 2

选C是因为句子意思是：他没有忘记过去经常被叫去惩罚的那间屋子，其实是call him to the room的被动形式，由于后半句是定语从句修饰前面的room，介词提前

Answer 3

题目模糊不清 其实A也可以