Question

The room ________ as a meeting room.

1. A.
   used to being used
2. B.
   was used to be used
3. C.
   was used to being used
4. D.
   used to be used

Answer 1

D
解析：used to do表示“过去……”；be used as则表示“被用作……”。由句意“这个房间过去被用作会议室。”可知本题应选D。④