阅读电视广告词： If we don t save water,the last drop of water will be a tear-drop. 根据提示，写一篇60-80词的短文。
提示：
1.生活离不开水。
2.可饮用水在减少。
3.水污染严重。
4.应保护水源，再利用水。
Water is very important to humans.We can t live without water.The water we can drink is falling.But some people don t seem to care about it.They waste a lot of water.They pour dirty water into rivers and lakes.Water pollution is getting more and more serious.So we must do something to stop the pollution.We not only protect the water but also find ways to reuse it.If we don t do this,the last drop of water will be a tear-drop.
水对人类很重要，我们不能没有水，水可以喝掉。但是有些人似乎并不在乎。他们浪费很多水。他们把污水排入河流和湖泊，水污染越来越严重，所以我们必须做点什么停止污染。我们不仅保护水，还发现利用它的方式。如果我们不这样做，最后一滴水将是一滴眼泪。