1、他们还乱扔垃圾到河流理去。
2、They waste a lot of water in their daily life.
3、适合人类喝的水是越来越少了。
4、Planting trees Trees are very helpful and important for us.
5、更糟糕的是他们排放污水到河流里。
6、No climbing.禁止攀爬。
7、we can't live without water.
8、Please keep off the grass.不要践踏草坪。
9、The amount of water which is suitable to drink is less and less.
10、No one can live without water or air.
11、日常生活中他们浪费很多水。
12、不要在地上扔垃圾。不要浪费水。当你写字时要在纸的两面都要写。停止使用塑料袋去购物。减少教室里德吵闹声。
13、Something must be done to stop the pollution.
14、Let's do our best to make it more beautiful.让我们尽力让它更美丽。
15、Do not throw rubbish onto the ground.Do not waste water.Use both sides of paper when you write.Stop using plastic bags for shopping.Make classrooms less noisy.不要在地上扔垃圾。不要浪费水。当你写字时要在纸的两面都要写。停止使用塑料袋去购物。减少教室里德吵闹声。
16、Even worse, they pour dirty water in to rivers.
17、But some people don't care about it.
18、人类必须采取一些措施来制止污染。
19、If we don't save water, the last drop of water will be a tear-drop of us.如果我们不节约水，那么最后一滴水也许会是我们人类的眼泪。
20、They throw rubbish into rivers , too.
21、The most important question in the world today is pollution.
22、As we know , water is very important to man.我们知道，水对人类来说是非常的重要。
23、Environmental problems directly affect the quality of people's lives.环境问题直接影响人们的生活质量。
24、Do not throw rubbish onto the ground.Do not waste water.Use both sides of paper when you write.Stop using plastic bags for shopping.Make classrooms less noisy.
25、Safety First.安全第一。
26、Earth is our home, you rely on green.地球是我家，绿化靠大家。
27、没有水我们就不能生存。
