What do you think made Mary so upset,------- her new bibycle
问题描述：
What do you think made Mary so upset,------- her new bibycle
a.Losing b.Because of losing
为什么选 a不选b 为什么,
Because of losing her new bike 好像没有谓语
答
答案：A
前面的问句不是以why开头的,所以不用because of 来作答.
句意：你认为是什么让玛丽怎么烦躁?--她把新自行车弄丢了.