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根据短文内容,然后从每题所给的四个选项中选择最佳选项。   

    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(日常) 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 on 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(表面). 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(沐浴) 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!

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阅读下面短文,从短文后所给的五个选项中选出能填入短文空白处的最佳选项,使短文通顺、连贯,意思完整。

Teenage life—better now, or in the past?

    Does this situation sound familiar(熟悉)?

    You are complaining(抱怨)to your parents about something. Maybe your computer isn't powerful enough to play the latest games.____.Then you hear…

    “When I was your age, there weren't any computers or video games. And I didn't get a bike until I was sixteen. And it was second-hand.____

    So, is it really true that life is better for teenagers now? It is certainly true that many teenagers have got more things nowadays.____So parents have got more money to spend on each child. And many things are cheaper than they were when our parents were children.

    ____ Forty years ago, no one could imagine a world with tiny computers and amazing smartphones. And now these things are necessary—we can't imagine living without them!

    However, technology often means we spend more time at home. And often it's just us, with our computer or television. Teenagers don't do enough exercise.____ And, although young people still get on well with their friends, some people think teenagers today don't have so many social activities as they did in the past.

    What do you think? How is teenage life better these days?

A. And it was too big for me.

B. A typical family is smaller now.

C. Or your friends' bikes are better than yours.

D. So they aren't as healthy as they were in the past.

E. Technology is probably the greatest change in our life.