Summer vacation is coming. The weather becomes hotter and hotter. Swimming is one of the best sports for us to get cool. But swimming is also a dangerous sport. Every year many students die from drowning (溺水). Here is some advice (建议) that can help you to be safe (安全的).
First, students mustn't swim somewhere too deep, like rivers. Swimming pool is a good place to swim. Second, students mustn't swim alone. If you want to swim, you have to go with your parents or friends. Another important thing is that students should do some sports before swimming. Making your body hot can be safer. Next, you can't swim for too long, either. If you are tired in the water, it is easy to be in danger. At last, please remember you mustn't jump into the river to save other people, because it's very dangerous. If you find someone in danger in the river, you can call the police or other adults like your parents and your teachers.
When you enjoy yourself in the water, don't forget to take good care of yourself.
