问题
选择题
---- What do you think made Mary so upset ?
---- __________.
A．As she lost
B．Lost
C．Losing
D．Because of losing
答案
答案：C
考查动名词做主语，句意是：什么使玛丽这么难过？--她丢了新自行车。说明回答的内容是主语，完整的句子是Losing her new bicycle made mary so upset。选C。