阅读理解

　　Of all the things we eat and drink, water is the most important．Not many people realize this but it is quite true．The human body can go without food for a long time, but two or three days without water usually results in death．

　　Many people do not know how much water the human body needs to work properly and many people don't drink enough, especially in hot weather most people drink when they are thirsty, but we often need more water every day, but we do not need to drink this amount because a lot comes from food we eat．If we do not have enough water, however, we feel tired and many become ill．Do you know what the best drink is?It is cold water．

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短文填空

　　　　1　　 all the things we eat and drink, water is the 　　2　　 important．Not 　　3　　 person understands this, but it is quite 　　4　　．The human body can go without food for a long time, 　　5　　 without water we'll be ill or die within two or three days．

　　Many people do not know 　　6　　 water the human body needs to work and they don't drink 　　7　　 water．Most people drink only when they 　　8　　 thirsty．But in fact(实际上)they often need 　　9　　 water, especially when they have done sports．

　　A man's body is made up of(由……组成)65 to 75 percent(百分比)of water．If we do not have enough water, we feel tired and 　　10　　 ill．

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