put (your) money on someone/something idiom
在…上下赌注
to risk money on someone or something winning a race or competition
He put some money on a horse in the five o'clock race. 他在五点钟那场比赛的一匹马身上下了赌注。
确信
to strongly believe that someone will do something or that something will happen
Chris will be promoted - I'd put money on it. 克里斯将得到提升——这点我深信不疑。