Water is the most important of all the things we eat and drink. Not many people understand this but it's {#blank#}1{#/blank#}true. The human body can go without food for a long time. We've got many examples for this. Yet two or three days without water can usually make people die. Man can't live without water.

    Many people don't understand how much water the human body needs to work{#blank#}2{#/blank#}, and many people, especially young people, do not drink{#blank#}3{#/blank#}, even in very hot weather. Our body has mostly water, about 65% to 75%. That is to say, about two thirds of our body is water. When we do sports, some of the water will get away from our body. If we don't drink some water, we won't have enough water. And if we don't have enough water, we'll feel{#blank#}4{#/blank#}and many of us will get ill. So you know how important water is to us.