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(自然资源) 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 30 years，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 450 liters(升) 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！
【小题1】On the earth，_______.

The English often go out with an umbrella or a raincoat. Why？ 36  the weather In Britain often changes quickly.
Spring can be rainy or windy, but the weather is  37  warmer and you can hope more sunny days. In fact , there  38  as much sunshine in spring as in summer. Summer is the  39  time for visitors to go to the seaside. People often go out to have a walk or swim. Autumn is a beautiful season. During autumn it is still nice to be outside ,too. In winter, it gets colder, and it might 40  ,especially in the north. There are  41  very heavy winds in this season.
February is usually the coldest   42 of the year , while the warmest  43 often July.
The difference   44   temperature between winter and summer is not so great in Britain. The average temperature for winter is about 4.5℃,and for   45 is about 15.5℃.
【小题1】A. Because     B. As           C. Since
【小题2】A. get         B. getting       C. gets
【小题3】A. can have     B. can         C. can be
【小题4】A. worst        B. best         C. earliest
【小题5】A. snow        B. rain         C. wind
【小题6】A. also         B. either        C. too
【小题7】A. month       B. season       C. weather 
【小题8】A. is          B. was         C. are
【小题9】A. in           B. on         C. for
【小题10】A. spring      B. autumn       C. summer

The English often go out with an umbrella or a raincoat. Why？ 36   the weather In Britain often changes quickly.

   Spring can be rainy or windy, but the weather is  37   warmer and you can hope more sunny days. In fact , there  38   as much sunshine in spring as in summer. Summer is the  39   time for visitors to go to the seaside. People often go out to have a walk or swim. Autumn is a beautiful season. During autumn it is still nice to be outside ,too. In winter, it gets colder, and it might  40   ,especially in the north. There are  41   very heavy winds in this season.

   February is usually the coldest   42  of the year , while the warmest  43  often July.

   The difference   44    temperature between winter and summer is not so great in Britain. The average temperature for winter is about 4.5℃,and for   45  is about 15.5℃.

1.A. Because     B. As           C. Since

2.A. get          B. getting       C. gets

3.A. can have     B. can          C. can be

4.A. worst        B. best         C. earliest

5.A. snow        B. rain         C. wind

6.A. also         B. either        C. too

7.A. month       B. season       C. weather 

8.A. is           B. was         C. are

9.A. in           B. on          C. for

10.A. spring       B. autumn       C. summer