He had some__________in swimming across the river.(succeed)

问题描述:

He had some__________in swimming across the river.(succeed)
应该是填名词吧?对于success的可数不可数如何判断

success 名词形式,在什么上取得成功
固定搭配,have success in sth.不用考虑单复数为什么这里不用复数呢固定搭配,不考虑单复数。。。感谢