（十九）（2009广东）
Water is the __1___ of all the things we eat and drink . Not many people understand this but __2____ quite true . The human body can go without ___3___ for a long time . We’ve got many examples for this . Yet two __4___ three days without water can usually make people __5____ . Man can’t live __6____ water .
Many people don’t understand how ___7__ water the human body needs __8___ work well , and many people , especially young people , do not drink enough , ___9__ 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 . __10 _ we don’t drink some water , we won’t have enough water． And if we don’t have enough water , we’ll feel tired and many of us will get ill . So you know how important water is to us .
