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White-furred animals are in danger of dying out. Climate (天气) change is causing a fall in snow cover, leaving them exposed (暴露的), a new study suggests.
Scientists in Poland have been following the worrying case of the white-coated weasel (白鼬), which sheds (褪去) its brown covering in the winter for a milky coat in order to blend easily into its icy environment.
But researchers have discovered that between 1997 and 2007 the number of days with snow cover was from 80 to 40 in Bialowieza Forest, Poland. It means that the little animals are caught out in a completely unsuitable environment, where they can be caught by foxes and crows. Scientists found that on days when there was little winter snow cover. The number of white-coated weasels they managed to catch fell to as low as 20 percent of the total. It meant that the rest had been killed.
The problem is likely to affect other white-furred animals such as the Arctic fox when the snow cover increasingly gives way to a landscape (风景) of greens and browns.
In the near future white weasels may disappear completely from many areas of Northern Europe and America. They will either be replaced by brown ones or they will evolve (进化).
Researchers also carried out tests using toys of brown and white-coated weasels to see if the colors were actually making a difference to predators (捕食者). They found lots of animals had come near to the white toys, but none had shown interest in the brown toys.
The researchers are hopeful the animals will learn to adapt (适应), but say they cannot rule out the animals disappearing completely.
1.写出划线单词them指代的内容。
__________________________
2.回答问题：Why does the weasel change its brown covering into white when winter comes?
__________________________
3.根据短文内容填空，第(1)题不超过3个词，第(2)题限填1词。
(1) White-furred animals are in danger of dying out because of _______________.
(2) In Bialowieza Forest, the number of days with snow cover reduced (减少) by ______ percent between 1997 and 2007.
4.选出划线短语rule out的意思。
A.give up B.imagine C.control
5.给短文拟一个恰当的题目，不超过8个词。
__________________________
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Animals are people's friends. But many wild animals are facing the danger of dying out, because the environment that they are living in has changed greatly. (1) For example, their living area has become smaller and smaller because of the development of cities and the increasing of population. They have no enough room to live in or enough food to eat. At the same time, men are trying their best to kill the animals just for getting their fur and skin, teeth and meat.
People should realize how serious it is and something should be done to protect the animals. (2)We should build some reserves in order that animals can live freely. And people should not be allowed to kill the endangered animals or eat their meat. We should do something to make our world cleaner. Fresh air, clean water and green grass are all important for animals. The death of endangered animals will bring a disaster to human beings .So we should improve the environment to save wild animals.
任务一：Why are wild animals facing the danger of dying out ?
1._______________________________________________________
任务二：把划线（１）翻译成汉语
2._______________________________________________________
任务三：给（２）处划线句子写一个同义句
3.We should build some reserves ________ ________ animals can live freely.
任务四：What’s the main idea of the passage ?
4._______________________________________________________
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—Nowadays many animals are facing the danger of dying out.
—Such a situation won’t be changed _______ humans stop hunting them.
A.because B.when C.unless D.though
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Do you know any of endangered animals？Why are they 1. danger?
Many wild animals have already 2.（die）out. And because 3. pollution and damaging forests, there are many endangered animals in the world, such as tigers and pandas. When farmers4.down trees, tigers and pandas can no longer hide. Many of them are 5.（kill）by people. If we do nothing, we may find 6.（we）alone on Earth. We should stop people from 7.（do）great damage to forests, and encourage people to plant 8.（many）trees. We should tell everyone animals 9.（be）our friends. Factories should stop polluting rivers or air.
If each of us does 10.（anything）to help protect animals, the world will be more beautiful.
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Thirteen years ago, the Planet Earth wildlife documentary took us all on an amazing journey. We went from deep rainforests to the bottom of the ocean. Now a new one ,Our Planet, will let us see different animals and the influence of humans on the natural world. The documentary covers 50 countries and areas. It took more than four years to produce it.
With the latest 4K video technology, the show allows people a wonderful new look at nature. “People are given a chance to better get themselves into the lives of the animals” said Fothergill, one of the show's producers.
Besides showing Earth's beauty, the documentary also talks about the planet's climate conditions. "Our Planet is here to say,' The planet is dying, and we're killing it.’" Fothergill said. In one sad scene, hundreds of walruses(海象)，half-blind when out of the water, fall down a rock and suffer a painful death on the beach below. It shows how the climate conditions have influenced their natural habitat and explains why they've been forced to find the safe place on the rocks.
But the documentary is not all about sadness. It also talks about success stories, such as the ones of tigers. These animals are saved and live happily thanks to international agreements on environmental protection.
Asking more people to take action in protecting our planet is the final goal of the new documentary. What we do in the next 20 years will decide the future of all life on Earth.
1.What's the documentary Our Planet about?
A.The relationship between the climate conditions human activities.
B.Different animals and the influence of humans on the natural world.
C.The living conditions of walruses and tigers.
D.The beauty and customs of 50 countries and areas.
2.What's the purpose of the last paragraph?
A.To explain what our goal is in the future.
B.To call for more people to protect our planet.
C.To tell us how the climate conditions influence animals.
D.To introduce international agreements on environmental protection.
3.What can we infer from the passage?
A.It took a lot of time and efforts to make the documentary.
B.The documentary is popular in many countries and areas.
C.We should have a new look at the environmental protection.
D.Our goal in the future is getting along well with animals.
4.Where is the text probably from?
A.A novel B.A dictionary C.A storybook D.A newspaper.
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This kind of animals has nearly _____ because their homelands are gone.
A. died out B. died of C. died D. been dead
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Much attention should be paid ____ the wild animals as many of them are dying out.
to protecting B. to protect C. protecting D. protect
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Much attention should be paid ____ the wild animals as many of them are dying out.
A. to protecting B. to protect
C. protecting D. protect
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More and more trees were cut down. , many animals are dying out.
A. So that B. As a result C. In order to
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More and more trees were cut down. _____, many animals are dying out.
A. In the end B. So that
C. As a result D. At last