孩子们在后院开心地玩闹打架，一边摔跤一边咯咯笑。

The kids were happily ___play-fighting in the backyard, giggling as they wrestled.

小狗们在地上嬉戏打闹，互相追逐着玩。

The puppies ___play-fight on the ground, chasing each other in fun.