同学你好，该知识点来自沪江网校《英语零基础直达大学六级【全额奖学金班】》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~
Three men got off and were stopped.
stopped可以改成questioned，盘问，和下文能更好地衔接起来。

When they were arrested, the Commanding Officer telephoned the station and explained who the men were, but the police did not believe again, so they sent a senior to the station.
did not believe可以改成refused to believe，拒绝采信
senior后面可以加上officer

祝同学学习进步~