两个小男孩在操场上扭打起来，老师赶紧过去分开他们。

The two little boys had a ___tussle on the playground, and the teacher rushed to separate them.

孩子们为谁该先玩玩具而扭打起来。

The kids had a ___tussle over who should play with the toy first.

两个小孩为最后一块饼干扭打起来。

The two kids ___tussled over the last cookie.