He was after winning the petition.
A. hot under the collar
B. on cloud nine
C. down in the dumps
D. feeling blue
网友回答
A. hot under the collar
(答案→)B. on cloud nine
C. down in the dumps
D. feeling blue
解析：四个选项分别表示怒气冲冲的、非常高兴、垂头丧气和无精打采，根据题意选B，赢了比赛后他非常高兴。