当敌对球迷在体育场外开始互相叫喊时，麻烦爆发了。

The ___trouble broke out when rival fans started shouting at each other outside the stadium.

警察被叫到酒吧去制止顾客之间的一些纠纷。

The police were called to the bar to break up some ___trouble between customers.

在那场大吵之后，他知道自己在家惹下了大麻烦。

He knew he had caused serious ___trouble at home after the big argument.