— What’s made you so upset?
— three tickets to the pop music concert.
A. Losing
B. Lost
C. Because of losing
D. Since I lost
网友回答
(答案→)A. Losing
B. Lost
C. Because of losing
D. Since I lost
解析：这题考查动名词，句意是：--什么使你这么难过？--丢了三张流行音乐会的票。说明回答的是主语的内容。用动名词做主语。