----I came to your office yesterday morning, but nobody was in.
----Oh, we a meeting in the meeting room.
A. have had
B. had
C. were having
D. had had
网友回答
A. have had
B. had
(答案→)C. were having
D. had had
解析：考察时态。句意：我昨天上午来你办公室了，但是里面没有人。——我，我们正在会议室开会。结合语境可知下文描述的是过去某时正在进行的动作，故用过去进行时态。选Ｃ。