题目内容

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Which is the most useful thing for us?

Of all the things we eat and drink, water is the most i____1_____. Not many people u____2____ this, but it is quite t____3____. The human body can go without f_____4____ for a long time, but two or three days without water usually make people d____5____.

Many people do not understand how much water the human bodies n____6___ to work well and they do not drink enough water, especially in h____7____ weather. Most people drink only when they want to drink. But in fact they often need m_____8___ water especially after doing s____9_____. A man’s body is 5 to 75 percent water. If we do not have enough water, we feel tired and may become i____10_____.

1.i             2. u             3. t             4. f           5 d          

6.n            7. h             8. m            9.s           10. i         

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