—What do you think made Mary so upset?
—________ her new bicycle.
A.Lose B.Lost
C.Losing D.Being lost
—What do you think made Mary so upset?
—________ her new bicycle.
A.Lose B.Lost
C.Losing D.Being lost
解析:句意:“你认为是什么让玛丽那么沮丧?”“她的新自行车丢了。”答语为省略句,补全为Losing her new bicycle made Mary so upset.故用动名词作主语。
答案:C