they have nothing against p______football after class.

问题描述:

they have nothing against p______football after class.

填playing。
They have nothing against playing football after class. 他们不反对课后踢足球。
have nothing against sb/sth 不反对某人或某事

playing
下课后没有什么事情比踢足球重要

playing
against是介词,后面是动名词