题目内容：

the room used to be uesd as a meeting room
the room _________as a meeting room.
A.used to being used B.was used to being used
C.used to be used D.was used to be used

优质解答

C 解析：A中 used to doing的意识的过去习惯干某事,to是介词
B中 sth be used to do 指某物被用来做,但选项用错了
C中是used to do意思是过去习惯于做某事
D中to be used是多余的,完全可以不要