After school we went to the reading-room to do some reading, only to be told that it .
A. was decorated
B. had decorated
C. had been decorating
D. was being decorated
网友回答
A. was decorated
B. had decorated
C. had been decorating
(答案→)D. was being decorated
解析：考查动词的时态和语态。根据上文可以推断（当时）阅览室正在装修之中，应该用过去进行时的被动语态。句意：放学后我们去阅览室想做些阅读，结果被告知阅览室正在装修之中。