完形填空。    In the past, man did not have to think about the protection of his environment. There were few people on
the earth, and natural resources seemed to be   1  .
    Today things are   2  , the world has become too   3  . We are using up our natural resources too quickly
and at the same time we are   4   our environment with dangerous chemicals (化学制品). If we continue to
do this, human life on the earth   5   survive. 
    Everyone   6   today that if too many fishes are taken from the sea, there will soon be none left. Yet, with
modern fishing   7  , more and more fishes are caught.We know that if too many trees are cut down,   8   will
disappear and nothing will grow on the earth. Yet we   9   to use bigger and more powerful machines to  10  
more and more trees.
    We realize that if rivers are polluted with waste products from factories, fish will die.  11 , in most countries
wastes are  12  put into rivers or into the sea, and there are  13  laws to stop this.
    We know, too, that if the  14  of the world continues to rise at the present rate, in a few years there will not
be enough  15 . What can we do to solve these problems?
    If we eat more vegetables and less  16 , there will be more food available (可用的) for everyone.Land that is
used to grow crops  17  five times more people than land where animals are kept.
    Our natural resources will  18  longer if we learn to recycle (循环再用) them.
    The world population will not rise so quickly if people use modern methods of birth  19 . 
    Finally, if we educate people to think about the problems, we shall have a better and cleaner  20  in the future.

(     )1. A. beautiful   (     )2. A. common      (     )3. A. crowded    (     )4. A. protecting   (     )5. A. may not    (     )6. A. wonders    (     )7. A. poles      (     )8. A. mountains (     )9. A. continue    (     )10. A. grow      (     )11. A. Thus      (     )12. A. still      (     )13. A. many      (     )14. A. production (     )15. A. houses    (     )16. A. fruit      (     )17. A. feeds      (     )18. A. use        (     )19. A. control    (     )20. A. nature	B. unlimited   B. the same    B. small      B. saving      B. will not    B. realizes    B. boats      B. the sea    B. have        B. plant      B. However    B. even        B. none        B. pollution   B. vegetables   B. meat        B. increases   B. stay        B. born        B. sea	C. unusual     C. changeable   C. dirty      C. polluting   C. shall not   C. considers   C. methods    C. trees      C. ought      C. save        C. Generally   C. also        C. some        C. population   C. food        C. fish        C. supplies    C.keep        C. plan        C. planet	D. valuable      D. different       D. busy          D. fighting        D. could not       D. discovers       D. ideas           D. forests       D. go on           D. cut down        D. Therefore       D. certainly       D. few             D. development                    D. places          D. grain           D. helps           D. last            D. pay             D. forest
1-5: BDACB   6-10: BCDAD   11-15: BADCD   16-20: BADAC
阅读理解。
Millions of years ago there were many types of dinosaurs on earth. Most dinosaurs were plant-eaters. The Apatosaurus, for example, had a long thin neck so that it could eat leaves from trees. Other dinosaurs were meat-eaters. The Tyrannosaurus Rex killed smaller dinosaurs for food.     Dinosaurs were real animals that once lived on the earth, but they died out about 65 million years ago. The disappearance of the dinosaurs is in some way a great mystery (谜). Some scientists think that the climate (气候) changed suddenly. Fossils (化石) of trees tell us that the temperature dropped a lot and that the level of the sea dropped as well. This means that it got suddenly much colder. Perhaps the dinosaurs were too slow to change with the climate.     A new idea is that a meteor (流星) crashed into the earth. Scientists discovered a place in Mexico where they think the meteor crashed. They think that there was a lot of dust from the meteor. The dust landed on the plants.Also the dust blocked (阻挡) the sun"s light for as long as five years. Many animals, including dinosaurs, were plant-eaters, and perhaps the dust killed them. This means there was nothing left for meat- eating dinosaurs to eat, and so they died out. But, as many animals from that time didn"t die, we are not 100% sure what really happened.
1. What is the subject discussed in the text?
[     ]
A. Dinosaurs, the real animals living millions of years ago. B. The two types of dinosaurs. C. The probable reasons for dinosaurs disappearance. D. A meteor crashed into the earth.
2. What are the two possible explanations to the dinosaurs disappearance?
[     ]
A. Temperature dropping and sea level dropping. B. Climate changing and meteor"s crashing. C. The dropping of temperature and sea level. D. Climate changing and the dust blocking the sun.
3. What is the direct cause of the disappearance of meat-eating dinosaurs?
[     ]
A. A meteor"s crashing. B. The dust blocking the sun. C. The plant-eating dinosaurs death. D. It is still unknown.
阅读理解。
Animals are natural resources that people have wasted all through our history.     Animals have been killed for their fur and feathers, for food, for sport, and simply because they were in the way. Thousands of kinds of animals have disappeared from the world forever. Hundreds more are on the danger list today. About 170 kinds in the United States alone are considered in danger.     Why should people care? Because we need animals. And because once they are gone, there will never be any more.      Animals are more than just beautiful and interesting. They are more than just a source of food. Every animal has its place in the balance of nature (生态平衡). Destroying one kind of animal can create many problems.      For example, when farmers killed large numbers of hawks (老鹰), the farmers stores of corn and grain were destroyed by rats and mice. Why? Because hawks eat rats and mice. With no hawks to keep down their numbers, the rats and mice multiplied (繁殖) quickly.      Luckily, some people are working to help save the animals. Some groups raise money to let people know about the problem. And they try to get the governments to pass laws protecting animals in danger.      Quite a few countries have passed laws. These laws forbid (禁止) the killing of any animals or plants on the danger list. Slowly, the number of some animals in danger is growing.
1. Animals are important to us mainly because ____.
[     ]
A. they give us a source of food B. they are beautiful and lovely C. they keep the balance of nature D. they give us a lot of pleasure
2. What has happened to the animals on the earth?
[     ]
A. Hundreds of kinds of animals have disappeared forever. B. Many kinds of animals have died out. C. About 170 kinds of animals have disappeared forever. D. All kinds of animals are in danger.
3. Which of the following is NOT true?
[     ]
A. People care much about animals because they need them. B. Once a certain kind of animals is gone forever, there will never be any more. C. Killing all rats and mice may cause some problems. D. People must not kill any animals.
4. What can we infer from the fact that quite a few countries have passed laws protecting animals in danger?
[     ]
A. Every person will know the importance of protecting wild animals. B. Animals in danger will not be killed any more. C. The number of some animals in danger will increase. D. Animals in danger will be kept away from people.
阅读理解。
Christian Eijkman, a Dutch doctor, left the Netherlands for the island of Java. Many people on the island had a disease called beri-beri. He was going there to try and find a cure.     At first, Eijkman thought some kind of germ (细菌) caused beri-beri. He raised some chickens. He didn"t eat them, but made experiments on them. The local people were quite surprised at that. One day he noticed that his chickens became sick when they were fed the food most Javanese ate-refined white rice (精炼米). When he fed them with unrefined rice, also known as brown rice, they recovered. Eijkman realized that he had made an important discovery - that some things in food could prevent disease. These things were named vitamins (维生素). The Javanese were not getting enough vitamins because they had actually removed the part that contains vitamins. Later, other diseases were also found to be caused by the lack of vitamins in a person"s food.     Today many people know the importance of vitamins and they make sure they have enough vitamins from the food they eat. If they don"t, they can also take vitamin pills.
1. The underlined word "cure" in Paragragh 1 probably means ______.
[     ]
A. a medical treatment B. a kind of vitamin C. a kind of germ D. a kind of rice
2. Christian Eijkman went to the island of Java to ______.
[     ]
A. spend his holiday B. find ways to grow better crops C. do some research about the island D. help the Javanese with their illness
3. Why did Christian Eijkman raise some chickens?
[     ]
A. To eat them. B. To carry out his experiments. C. To give the Javanese a surprise. D. To make money by selling them.
4. We can learn from the passage that ______.
[     ]
A. beri-beri was caused by chickens B. the Javanese didn"t like vitamins C. Christian Eijkman"s experiment was successful D. the Javanese"s disease was caused by a kind of germ
仔细阅读课文How Daisy Learned To Help Wildlife，写出文章的段落大意。
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根据课文内容用适当的词填空，使短文完整。(一空一词)
Not long ago, a girl called Daisy took a magic 1.______ around the world, riding a flying chair. First, she came to Tibet in China to visit antelopes. But to her great 2._____, she could only see mountains and people.     Then an antelope told her 3.______ that they were being killed 4.______ large numbers by humans for their wool to make clothing. And they might be 5._______ forever in three years. Then the flying chair took Daisy to Zimbabwe, 6.______ wildlife was properly protected. Daisy was glad to learn that farmers there were not killing the animals at will as they 7._____ to. Only a certain number of the animals were set to be 8.______ for fee by the government, 9.______ not only saved the animals but benefited the farmers as well.     At last, Daisy flew to a 10.______ rainforest. There she was puzzled to see a monkey 11.______ (rub) a millipede insect over its body. Then the monkey told her the insect contained a 12._______ drug which affected mosquitoes and 13._______ rubbing it over the body it could 14._______ itself from mosquitoes. Now Daisy was amazed and excited to find in fact the forest 15._______ a lot of precious things people can make use of. So protecting nature really means much to our humans.