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 earth 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 beautiful or interesting or 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(鷹), 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 animal or plant on the danger list. Slowly, the number of some animals in danger is growing.

  1. 1.

    Why do people kill animals?

    1. A.
      They kill animals for something they need.
    2. B.
      They kill animals to raise some money.
    3. C.
      Animals destroy their natural resources.
    4. D.
      Animals create many problems.
  2. 2.

    Animals are important to us mainly because ______.

    1. A.
      they give us a source of food
    2. B.
      they are beautiful and lovely
    3. C.
      they keep the balance of nature
    4. D.
      they give us a lot of pleasure
  3. 3.

    Which of the following is NOT true?

    1. A.
      People care much about animals because they need them.
    2. B.
      Once a certain kind of animal is gone forever, there will never be any more.
    3. C.
      Killing all rats and mice may cause some new problems.
    4. D.
      People must not kill any animal or plant.
ACD
我們已經(jīng)殺死了太多的動(dòng)物。文章解釋了很多為什么我們不能再殺死動(dòng)物的原因。
1.A 細(xì)節(jié)題。根據(jù)文章第2行Animals have been killed for their fur and feathers, for food, for sport,可知A正確。
2.C 細(xì)節(jié)題。根據(jù)第4段第2句Every animal has its place in the balance of nature.可知C正確。
3.D推理題。根據(jù)文章內(nèi)容可知ABC都正確。D項(xiàng)太絕對(duì)化了。
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科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

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  D.Keep to the eight-hour sleep pattern.

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C.that has been brought in?

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Research advances over the past decade have told us that, with a little work, we humans can clone just about anything we want, from frogs to monkeys and probably even ourselves!

    So, we can clone things, but why would we want to?

    Of all the reasons, cloning for medical purposes has the most potential to benefit large numbers of people. How might cloning be used in medicine?

    1. Cloning animal models of disease

    Much of what researchers learn about human disease comes from studying animal models such as mice. Often, animal models are genetically engineered to carry disease-causing mutations(變異) in their genes. Creating these transgenic(轉(zhuǎn)基因的) animals is a time-intensive process that requires trial-and-error and several generations of breeding(培育). Cloning technologies might reduce the time needed to make a transgenic animal model, and the result would be a population of genetically identical animals for study.

    2.Cloning stem cells(干細(xì)胞) for the treatment of diseases

    Stem cells are the body's building blocks, responsible for developing and repairing the body throughout life. As a result, they might be used to repair damaged or diseased organs and tissues. Researchers are currently looking up cloning as a way to create certain human stem cells for the research of diseases.

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    C.develop and maintain the body

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