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. Thousa 题目和参考答案——青夏教育精英家教网—

题目内容

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. 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 the killing of any animals or plants on the danger list. Slowly, the number of some animals in danger is growing.

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

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.

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.

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.

【小题1】C【小题2】B【小题3】D【小题4】C

解析:

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In the past, man did not have to think about the protection of his environment. There were few people on the earth, and natural   36  seemed to be unlimited.
Today things are   37  . The world has become too   38  . We are   39  our natural resources too quickly, and at the same time we are   40  our environment with dangerous chemicals. If we   41  to do this, human life on earth will not   42 .
People realize today that if too many   43  are taken from the sea, there will soon be none left. Yet, with modern fishing   44  , more and more fish are caught.
We know that if too many trees are cut down,   45  will disappear and nothing will 46  on the land. Yet, we continue to use bigger and more powerful machines to   47  more and more trees.
We realize that if rivers are polluted with waste products from factories, we will die.   48  , in most countries waste products are still put into rivers or into the sea, and there are few laws to   49 this.
We also know that if the   50  of the world continues to rise at the present rate, in a few years, there won't be enough food. What can we do to solve the   51  ? If we eat more vegetables and less   52  , there will be more food available for everyone. Land that is used to grow crops feeds five times more people than land where animals are kept.
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Finally, if we   55  people to think about the problems we shall have a better and cleaner planet in the future.

The food we eat seems to have great effects on our health. Although science has made great steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to diet as well. Different cultures are subject to certain illnesses because of the food that is characteristic in these cultures. That food is related to illness is not a new discovery.

In 1945, government researchers realized that nitrates(硝酸盐) and nitrites(亚硝酸盐), commonly used to keep color in meats, and other food additives, caused cancer. Yet, these additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels(标签) of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to cows and chick and because of this, penicillin has been found in the milk of treated cows.

Sometimes similar drugs are given to animals not for medicinal purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to get a higher price on the market. Although the FDA has tried repeatedly to control these, the practices continue.

1.How has science done a bad service to mankind?

A. Diseases caused by food have been done away with.

B. It has caused a lack of information about the value of food.

C. Some harmful materials have been added to our food.

D. Scientists have made food more expensive to eat.

2.What are nitrates used for?

A. They help process packaged food.

B. They keep the color in meats.

C. They cure diseases of cows and chickens.

D. They cause the animals to become fatter.

3.Which of the following statements is NOT true?

A. You can find out harmful additives on the packaging labels of food.

B. Drugs given to animals are not all for medical reasons.

C. Researchers knew about the harm of food additives about 60 years ago.

D. Food may cause forty percent of cancer in the world.

4.According to the passage, the FDA might be _________.

A. an organization which controls the safety of food

B. a producer which makes additives

C. a factory which processes food

D. a hospital which cures cancer

Motherhood may make women smarter and may help prevent dementia(痴呆) in old age by bathing the brain in protective hormones(荷尔蒙) , U.S. researchers reported on Thursday.

Tests on rats show that those who raise two or more litters of pups do considerably better in tests of memory and skills than rats who have no babies, and their brains show changes that suggest they may be protected against diseases such as Alzheimer’s(早老痴呆症). University of Richmond psychology professor Craig Kinsley believes his findings will translate into humans.

“Our research shows that the hormones of pregnancy(怀孕) are protecting the brain, including estrogen(雌激素), which we know has many neuroprotective (保护神经的) effects,” Kinsley said.

“It’s rat data but humans are mammals just like these animals are mammals,” he added in a telephone interview. “They go through pregnancy and hormonal changes.”

Kinsley said he hoped public health officials and researchers will look to see if having had children protects a woman from Alzheimer’s and other forms of age-related brain decline.

“When people think about pregnancy, they think about what happens to babies and the mother from the neck down,” said Kinsley, who presented his findings to the annual meeting of the Society of Neuroscience in Orlando, Florida.

“They do not realize that hormones are washing on the brain. If you look at female animals who have never gone through pregnancy, they act differently toward young. But if she goes through pregnancy, she will sacrifice her life for her infant—that is a great change in her behavior that showed in genetic alterations(改变) to the brain.”

1.What does the phrase “litters of pups” mean in the second paragraph?

A. Baby rats. B. Animals. C. Old rats. D. Grown-up rats.

2.What can protect the brain of a woman according to the passage?

A. Estrogen. B. The hormones of pregnancy.

C. More exercise. D. Taking care of children.

3.“It’s rat data but humans are mammals just like these animals are mammals.” What does the sentence suggest?

A. The experiments on the rats have nothing to do with humans.

B. The experiments on the rats are very important for animals.

C. The experiments on the rats are much the same on humans.

D. The experiments on the rats are much the same on other animals.

4.Which title is the best for this passage?

A. Do You Want to Be Smarter? B. Motherhood Makes Women Smarter

C. Mysterious Hormones D. An Important Study

Directions: For each blank in the following passage there are words or expressions marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context.

In the past, man did not have to think about the protection of the environment. There were few people on the earth, and natural resources seemed to be 36 ___________ .

Today things are different, the world has become too 37________. We’re using up our natural resources too quickly, and at the same time we are 38__________our environment with dangerous chemicals. If we continue to do this, human life on the earth will not survive.

Everyone realizes today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing methods, more and more fish are caught. We know that if too many 39_____ are cut down, forests will disappear and nothing will grow on the land. Yet, we 40______ to use bigger and more powerful machines to 41_________more and more trees.

We realize that if rivers are polluted with waste products from factories, we will die. 42_____, in most countries wastes are still put into rivers or into the sea, and there are 43__________laws to stop this.

We know, too, that if the 44_______ of the world continues to rise at the present rate, in a few years there will not be enough food. 45________ can we deal with these problems ?

If we eat more vegetables and less meat, there will be more food available for everyone. Land that is used to grow crops on feeds five times more people than land 46_____ animals are kept. Our natural resources will last longer if we learn to recycle them. The world population will not rise so quickly if people use modern methods of birth control. Finally, if we educate people to think about the problems, we 47_____ have a better and clearer planet in the future.

1.A. beautiful B. unlimited C. rare D. valuable

2.A. crowded B. small C. dirty D. busy

3.A. protecting B. saving C. polluting D. fighting

4.A. mountains B. flowers C. trees D. grass

5.A. continue B. have C. ought D. go on

6.A. grow B. plant C. save D. cut down

7.A. Thus B. However C. Generally speaking D. Therefore

8.A. too many B. a few C. some D. few

9.A. production B. pollution C. population D. revolution

10.A. What B. How C. Why D. Where

11.A. that B. which C. where D. what

12.A. may B. can C.should D. shall

完形填空（共20小题，每小题1分，满分20分）

从A.B.C.D四个选项中，选出可以填入空白处的最佳选项。

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 31 ．

Today things are 32 , the world has become too 33 ．We are using up our natural resources too quickly and at the same time we are 34 our environment with dangerous chemicals．If we continue to do this, human life on the earth 35 survive．

Everyone 36 today that if too many fishes are taken from the sea, there will soon be none left． Yet, with modern fishing 37 , more and more fishes are caught．We know that if too many trees are cut down, 38 will disappear and nothing will grow on the earth．Yet we __39 to use bigger and more powerful machines to 40 more and more trees．

We realize that if rivers are polluted with waste products from factories, fish will die． 41 , in most countries wastes are 42 put into rivers or into the sea, and there are 43 laws to stop this．

We know, too, that if the 44 of the world continues to rise at the present rate , in a few years there will not be enough 45 ．What can we do to solve these problems?

If we eat more vegetables and less 46 ,there will be more food available for everyone．Land that is used to grow crops 47 five times more people than land where animals are kept．

Our natural resources will 48 longer if we learn to recyclethem．

The world population will not rise so quickly if people use modern methods of birth 49 ．

Finally, if we educate people to think about the problems, we shall have a better and cleaner 50 in the future．

1.A．beautiful B．unlimited C．unusual D．valuable

2.A．common B．the same C．changeable D．different

3.A．crowded B．small C．dirty D．busy

4.A．protecting B．saving C．polluting D．fighting

5.A．may not B．will not C．shall not D．could not

6.A．wonders B．realizes C．considers D．discovers

7.A．poles B．boats C．methods D．ideas

8.A．mountains B．the sea C．trees D．forests

9.A．continue B．have C．ought D．go on

10.A．grow B．plant C．save D．cut down

11.A．Thus B．However C．Generally D．Therefore

12.A．still B．even C．also D．certainly

13.A．many B．none C．some D．few

14.A．production B．pollution C．population D．development

15.A．houses B．vegetables C．food D．places

16.A．fruit B．meat C．fish D．grain

17.A．feeds B．increases C．supplies D．helps

18.A．use B．stay C．keep D．last

19.A．control B．born C．plan D．pay

20.A．nature B．sea C．planet D．forest

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