题目内容：

—What do you think made Mary soupset?_____her new bike.A.As she lo.com

优质解答

答案选C.Losing.去掉问句中的插入语do you think,便知要回答的是主语what.选项中只有动名词Losing可作主语,全句应为：Losing her new bike made Mary so upset.