Water is very important for us. We must drink water everyday. We can't live without water.
Water is everywhere around us. At home, we use water to wash clothes, wash dishes, cook rice, clean the flat, have showers, clean our teeth and so on. At work, people use water to put out fires, grow vegetables, make things in factories and so on. Water is important for us, isn't it?
There isn't much water on the earth. It is not inexhaustible. It is very valuable. We must save it.