问题补充:
---What do you think made her so upset?
--- her hometown.
A. As she missed
B. Missed
C. Because of missing
D. Missing
答案:
A. As she missed
B. Missed
C. Because of missing
(答案→)D. Missing
解析:句意:你认为什么使她这么不愉快?想念家乡使她这么不愉快。这是一个省略句,完整形式为:Missing her hometown made her so upset.故选D。