4．Napoga is a 12-year-old girl in Ghana （加纳），Africa．It is hard for her family to get clean water．Every morning，she leaves home at half past five to get clean water for her family in a village far away．It takes her six hours to get enough clean water for daily cooking and drinking．She has no time to go to school or to play with her friends．Millions of people in the world are like Napoga．They can't get enough clean water to keep healthy．
Earth Day is April 22．But on all other days，we must also remember it．The water we use is the most important natural resource on the earth．
Water covers 70% of the earth's surface．But most of that is sea water．We can't use it for very many things．Fresh water covers only 1% of the earth's surface．
You probably feel lucky that your life isn't as hard as Napoga's．But that doesn't mean you don't have to worry about water．We all face serious water problems．One of them is water pollution．All kinds of things from cars，factories，farms and homes make our rivers，lakes，and oceans dirty．Polluted water is very bad for people to drink．And dirty water is bad for fish，too．Now，34% of all kinds of fish are dying out．
How do cars and factories make our water dirty？First，they pollute the air．Then，when it rains，the rain water comes down and makes our drinking water dirty．Dirty rain，called acid rain （酸雨），is also bad for plants，animals and buildings．
Scientists say that in 30years，more than half of the people in the world won't have enough clean water．We have to learn how to save more water for ourselves and our children．Here is some advice for saving water：
●Turn off the water while you brush your teeth．You can save as much as 450liters each month．
●Leaky taps （漏水的龙头） waste a lot of water．Fix them right away!
●You can easily cut your 10-minute showers in half-and you'll be just as clean．
●When you wash dishes，don't let the water run．
●Only wash clothes when you have a lot to wash．If your washing machine isn't full，you're wasting water!
56．Every morning Napoga went to get clean waterA．
A．without going to school
B．before she went to school
C．after she finished school
D．after she played with her friends
57．On the earth，C．
A．there is 71% of fresh water
B．we don't need to worry about water
C．there is very little water for our living
D．sea water is widely used than fresh water
58．Acid rainD．
A．is only bad for living things
B．can be produced in factories
C．doesn't do harm to people，but it's bad for plants，animals and buildings
D．doesn't just do harm to human beings but to animals，plants and buildings
59．What's the main idea of the passage？A
A．It's time to take care of the water we use．
B．Water is the most important natural resource on the earth．
C．Something must be done to prevent water form being polluted．
D．Clean water means much to human beings and living things around us．
分析 文章大意：文章大意：Napoga 是非洲加纳的一个十二岁的女孩，每天早上5：30去很远的一个村庄获取干净的水，要花六个小时取够每日的用水，没时间去上学玩耍，世界上很多这样的人，不能有足够的干净的水去保持健康．
我们使用的水是地球上最宝贵的重要自然资源，地球的70%是水，大部分是海水，新鲜水只有地球表面的1%．
我们现在有很严重的水源问题，其中一个就是水污染，污水对我们的健康不利，对鱼也有害，所有种类的34%的鱼已经灭绝，汽车和工厂污染了大气，下雨时，污水就会落下，让我们的饮用水变脏．脏的雨水叫做酸雨对植物，动物和建筑有害．
科学家说30年后，地球上有一半多的人没有足够的水，我们要为我们自己和孩子节约用水．
解答 56-59：ACDA
56题答案：细节题．根据文中的一段：She has no time to go to school…"可知，她根本没有时间去上学．故选C．
57题答案：细节题．根据三段Water covers 70% of the earth's surface．But most of that is sea water．We can't use it for very many things．Fresh water covers only 1% of the earth's surface．70%被水覆盖，但只有1%是饮用淡水．而世界上的很多国家和地区都缺水．所以选B项，即我们的生活用水很少．
58题答案：细节题．根据四段的Dirty rain，called acid rain，is also bad for plants，animals and buildings．脏雨，叫酸雨，对植物、动物和建筑物也有害可知，acid rain的危害很大．故选D．
59题答案：归纳题．根据文章大意应该节约用水了，故选A．
点评 本文是一篇日常生活类阅读，题目涉及多道细节理解题，做题时结合原文和题目有针对 性找出相关语句进行仔细分析，结合选项选出正确答案．推理判断也是要在抓住关键句子的基础上合理的分析才能得出正确的答案．
