When Dr.Robert Metcalf first used a solar cooker,the future changed for millions of Africans.He knew that billions of poor people around the world depend on the use of wood for cooking.As they take more and more firewood from wild areas.they are destroying habitats around the world.Wood collection is one reason why many animals have become endangered.

   “But sunshine can be an alternative to fire.”Dr.Metcalf says.Since his first solar cooked meal,he has helped people around the world to use simple new technologies to cook their food.

    Each morning in villages across East Africa,small children and their mothers wake up and walk several miles to collect firewood to cook their food.It takes much of the day,and the heavy firewood they carry home on their heads lasts only a few days.

    This is why Dr.Metcalf spends each summer in Africa.He teaches women and children in villages how to cook with the sun.So far,more than thirty thousand African families now have solar cookers,and new programs will introduce solar cookers to millions of families.

    To find water,women and children may have to walk long distance to dig holes in dry riverbeds or to gather water from streams and shallow wells.

      They fill their buckets(桶)and carry them home on their heads.The buckets often weigh as

much as forty pounds.Not only is finding water hard work,but the water is often polluted with

germs(細(xì)菌)that make people sick.

      Dr.Metcalf and others developed a simple,reusable tool that people can use to make sure their water is safe∞drink.The tool is calked a WAPI,which stands for“Water Pasteurization Indicator”.The pasteurization process is named after Louis Pasteur,who developed it in the 1800s.

1.Why did Metcalf help Africans use solar cookers?

      A.He wanted to help them to fight poverty.

      B.He found it a dangerous job to collect firewood.

      C.He realized using firewood is not good for the environment.

      D.He realized using solar cookers would save Africans a lot of money.

2.The underlined word“it”in the third paragraph probably refers to“         ”.

      A.collecting firewood                             B.cooking food

      C.cooking with the sun                          D.introducing solar cookers

3.Each summer Metcalf stays in Africa to              

      A.do research on water

      B.take care of sick people

      C.spread the technique of using solar cookers

      D.find out why some animals are endangered

4.Water Pasteurization Indicator was developed to         

      A.kill the bacteria in water

      B.honor Louis Pasteur

      C.make waste water reusable

      D.dig holes in riverbeds

5.It can be inferred from tile passage that          

      A.Africans find it hard to learn to use solar cookers

      B.women and children in Africa usually lead a hard life

      C.the water Africans drink is not clean though it is easy to get

      D.the water in Africa is polluted because of industrial development

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閱讀下面短文,從短文后各題所給的A、B、C、D四個(gè)選項(xiàng)中,選出最佳選項(xiàng)。
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When Dr. Gibbs wasn’t saving lives, he was planting trees. His house sat on ten acres, and his life’s goal was to make it a forest.

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C. “Practice makes perfect”                               D. “No pain, no gain”

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A. strong                        B. strange         C. deep                          D. old

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A. I wish them strong wings, with which they can fly higher and touch the sky.

B. I wish them nice fortune so that they can meet people like Dr. Gibbs in the future.

C. I wish them deep roots into the earth since the rains fall and the winds blow often.

D. I wish them great shades under the tree since the sunlight is always sharp and bitter.

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