After school we went to the reading-room to do some reading only to be told that it .A.

问题补充：

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

答案：

A. was decorated

B. had decorated

C. had been decorating

(答案→)D. was being decorated

解析：考查时态：句意：放学后，我们去阅览室看书，结果被告知阅览室正在装修。所以这个动作是过去正在进行，而且the reading-room和 decorate是被动关系，用过去进行时的被动。选D。