19、Water is important in our life．For example，we brush our teeth with water，and farmers

use it to water plants．If there is no water，we can't cook food and can't put out the fire．In

a word，we can't live without water．We must try our best to save water．We should turn

off the shower when we put the shampoo in the hair．Also we should save water by turning off the tap after we use it．So it's necessary for us to save water．