问题补充:
—What’s made you so upset?
—with my best friend.
A. Quarrel
B. Quarrelling
C. Because of quarrelling
D. Since I quarreled
答案:
A. Quarrel
(答案→)B. Quarrelling
C. Because of quarrelling
D. Since I quarreled
解析:考查非谓语动词。句意:什么让他如此心烦:和我最好的朋友吵架了。下文为省略句。动名词做主语表示抽象动作,故选B。