Tony: Hey, Mark, maybe we could go swimming in the river later this afternoon.
托尼：嗨，马克，或许今天下午晚些时候我们可以去河里游泳。
Mark: I don't think I want to go, Tony.
马克：我认为我不想去，托尼。
Tony: Why not?
托尼：为什么不想去？
Mark: I was there last weekend and the river was really dirty. Even the bottom of the river was full of rubbish, and there were no more fish for fishermen to catch.
马克：上周末我去那儿了，河里真的很脏。甚至河底充满了垃圾，不再有鱼让渔民去捕。
Tony: No way! It used to be so clean. In fact, it has always been the nicest river in this town.
托尼：不可能!过去它是那么干净。事实上，它一直是这个镇上最美丽的河流。
Mark: Not anymore. I think people are throwing litter into the river. Factories are also putting waste into the river.
马克：不再是了。我认为人们正在把垃圾扔进河里。工厂也正在把废物倒进河里。
Tony: That's terrible! We should write to the government. They should close down the factories.
托尼：那太可怕了！我们应该给政府写信。他们应该关闭那些工厂。
Mark: Good idea! But I think everyone in this town should help to clean up the river, too. Everyone should play a part, not just the government.
马克：好主意！但我认为镇上的每个人也都应该帮助清理河流！人人都应该参与，不仅仅是政府。
