He spends all he free time _______ his son.A.on B.in C.with为什么这个题不用spend on?

问题描述:

He spends all he free time _______ his son.A.on B.in C.with
为什么这个题不用spend on?

With
Spend time with sb. 与某人共度时光。

With
Spend time with sb.与某人共度时光.