The noise from the top floor，loud and constant，of the meeting-room can be clearly heard in our classroom．
A. to decorate
B. having been decorated
C. being decorated
D. decorating
网友回答
A. to decorate
B. having been decorated
(答案→)C. being decorated
D. decorating
解析：句意：来自顶层的嘈杂的连续的会议室被装修的噪音在我们教室能被清楚的听见。介词of后面接动名词，the meeting room是动名词的逻辑主语，因为the meeting room和decorate是被动关系，所以用动名词的被动做宾语，选C。