31.  We don't waste water, and we ought to prevent the water from polluting .

32.  In addition, we should avoid wasting water in our daily lifes .

33.  Above all, we ought not to waste fresh water any more.

34.  We should acquire not to wasting fresh water in dialy life, control the growth of the population, protect fresh water from being polluted and try to find a way to get fresh water from the sea.

35.  In addition, lots of people waste fresh water now and then.

36.  It is that you will see your tear as the lastest drop of water if you waste fresh water.

37.  So we mustn't waste water.

38.  It is important that we do not waste water.

39.  Don't waste water in our daliy life.

40.  If we want to suvive on the earth, we would not waste water.