III.阅读理解(10分) If you don't know how much water you need,I'm not surprised. Different advice in recent newspapers appears to be against the old‘‘8-a-day”advice we all grew up with. Is it necessary to drink eight glasses of water daily,or is this already out of date?

WeVe heard for years that eight glasses of water daily is necessary for a person to keep healthy. Your vsejght loss and health depend on it. Drink eight glasses of Water daily and see clearer skin,better sleep,and improved eyesight. We’re warned of (被警告) losing watej without at least eight glasses. But,there are :i0rnp%iew ideas of examining your daily diet,including IIWhat you eat,as well as what you drink.

The answer is. . . you need what you need!If it's summer,you need more. If you’re exercising,you need more. If you’re a “normal” inactive person,and not exercising more than 15〜20 minutes daily,you need no more than four glasses of water daily. Most drinks can be counted as part of your daily water intake (摄入) . Although the World Health Organization suggests that everyone drink about eight cups,the old “8-a-day” rule is based on studies on people under difficult situations,including soldiers at high altitude (高空) and hospitalized patients —what you and I need is different.

1. Is it possible for people not to know how much water they need daily?

 

2. What does the old “8-a-day” advice mean?

 

3. Who is the old “8-a-day” rule for?

 

4. People under different situations need different amount of water,don't they?

 

5. What is the passage mainly about?

 

   

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