washing their face and rinsing the mouth,they don't turn off the water tap .let the water flowing day and night. what a pity!

　　expect the tings i just mention,there are more and more in our life.so now i hope our students take care of wate.and the same time we need do things to prevent water pollute as we can do .that's what i want to say.why not do it right now,come on .

　　好不容易写完了，终于可以写汉字了。本人打字有些慢，但还是完成了，很高兴。愿采纳，谢谢！

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