Swimming is a good sport. It's popular. People like swimming because the water makes people feel cool. But if they swim in a wrong place, it is very dangerous. These years, some people died when they were enjoying themselves in water and most of them were students. Summer holiday will be there again. I want to give you some advice. First, don't get into the water when you are alone. Second, don't get into the water if there is a No swimming sign. Third, you should be careful in the water. If you remember these, swimming will be safe and it's good for your health.