题目内容：

The room__ as a study.A,used to being usedB,used to be usedC,was used to
The room______ as a study.A、used to being usedB、used to be usedC、was used to be usedD、was used to being used

优质解答

答案：B
解析：use to + 动词原形,表示过去常常做某事,be used as 是被动语态,被用作.
翻译：这个房间过去是用作书房的.