同学你好，该知识点来自沪江网校《新概念英语2、3、4册连读【天猫特惠】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好～
In the struggle, the strap broke and, with the bag in their possession, both men started running through the trees. 这不是定语从句，这就是主句。
both men started running through the trees是and连接的另一个分句。

broke是可以的，这时候不用被动语态，不强调是被谁弄断的，比如
The string broke.
绳子断了。

祝同学学习进步～