—What’s made you so upset? —with my best friend.A. QuarrelB. QuarrellingC. Because of quar

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。