Many species of animals are in danger of due to the pollution these days. [ ]A. dying out B. dying awayC. dying off D. dying down 题目和参考答案——青夏教育精英家教网—

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Many species of animals are in danger of ________ due to the pollution these days.

[ ]

A. dying out
B. dying away
C. dying off
D. dying down

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本文介绍了美国著名的生物学家Edward Wilson 的著作The Future of Life中的一些有关如何开发、利用和保护自然资源的情况。

Edward Wilson is America’s, if not the world’s, leading naturalist. In The Future of Life, he takes us on a tour of the world’s natural resources(资源). How are they used? What has been lost? What remains and is it able to continue with the present speed of use? Wilson also points out the need to understand fully the biodiversity(生物多样性)of our earth.

Wilson begins with an open letter to the pioneer in environment (环境) protection, Henry David Thoreau. He compares today’s Walden Pond with that of Thoreau’s day. Wilson will use such comparisons for the rest of the book. The problem is clear: man has done great damage to his home over the years. Van the earth, with human help, be made to return to biodiversity levels that will be able to support us in the future?

Biodiversity, Wilson argues, is the key to settling many problems the earth faces today. Even our agricultural crops can gain advantages from it. A mere hundred species(物种) are the basis of our food supply, of which but twenty carry the load. Wilson suggests changing this situation by looking into ten thousand species that could be made use of, which will be a way to reduce the clearing of the natural homes of plants and animals to enlarge farming areas.

At the end of the book, Wilson discusses the importance of human values in considering the environment. If you are to continue to live on the earth, you may well read and act on the ideas in this book.

We learn from the text that Wilson cares most about ______

A. the environment for plants

B. the biodiversity of our earth

C. the wastes of natural resources

D. the importance of human values

How many species are most important to our present food supply?

A. Twenty. B. Eighty. C. One hundred D. Ten thousand.

Wilson suggests that one way to keep biodiversity is to _______.

A. learn how to farm scientifically

B. build homes for some dying species

C. make it clear what to eat

D. use more species for food

We can infer that the text is _______

A. a description of natural resources

B. a research report

C. a book review

D. an introduction to a scientist.

Whenever human populations have lived in forest areas, they have always cut down trees which they used for a number of purposes, for housing and ships and served as a source of heating fuel and timber. Growth of cities often meant expansion into forest areas, while even more trees were removed to provide space for agriculture. With the growing demand for paper, vast quantities of trees have also been cut down for paper production. These factors, along with many others, have been contributing to a dangerous phenomenon known as deforestation.
In the last 5,000 years, humans have reduced forest from roughly 50 percent of the earth’s land surface to less than 20 percent. Most of this original, or old growth, forest cover is concentrated in three large areas: the Canadian and Alaskan boreal forest, the boreal forest of Russia, and the tropical forest of the northwestern Amazon Basin and the Guyana Shield. These areas comprise almost 70 percent of the world’s remaining original forest cover. In most places, the rate of deforestation is increasing, with the alarming result of 16 million hectares disappearing worldwide every year.
Loss of forest does not just mean the decline of natural resources. There are several other factors that make deforestation seriously harmful to both the human and natural worlds. One of them is changes in the global climate. For example, forest clearance is releasing substantial volumes of carbon dioxide (CO2) into the atmosphere as vegetation is burnt or decays. It has been suggested that this is a significant factor in global warming. Moreover, about 10 percent of the world’s tree species are in danger of extinction as a result of deforestation. Deforestation also threatens biological diversity through the destruction of wildlife habitats, which endangers a number of animal species and leads to their potential disappearance. Species are particularly easy to extinction in tropical rainforests because many species have few individuals per unit area, which makes reproduction more difficult. Finally, since forests play an important role in storing water and stabilizing soil, deforestation and the resulting change in land use cause soil erosion (腐蚀) and other forms of land degradation.
72.   The passage discusses all of the following EXCEPT the ________.
A. causes of deforestation                                   B. consequences of deforestation
C. management of deforestation                      D. rate of deforestation
73.   The word “diversity” in the last paragraph probably means “________”.
A. variety                                                                  B. expansion
C. development                                                      D. advantage
74.   Why does the author mention fuel and timber in Paragraph 1?
A. To explain the rate of deforestation.
B. To compare them with housing and ships.
C. To show the dangers of deforestation.
D. To illustrate the causes of deforestation.
75.   Which of the following sentences summarizes Paragraph 3 best?
A. Deforestation threatens biological diversity.
B. Deforestation has many harmful consequences.
C. Deforestation causes changes in global climate.
D. Deforestation should be stopped.

Prince Charles yesterday promised to reduce the royal impact on the environment through sweeping changes to his personal lifestyle and official schedule. The prince will replace carbon-heavy private jets and helicopters with scheduled flights and train services.
The move came as Prince Charles urged business leaders to publish the environmental pact of their activities.
He said, “Few accountants and business decision-makers ask, ‘How much of our critical natural resource is left? How many miles of polar ice cap has our business helped melt this year? By how many inches have we raised sea levels? How many species have we put at risk? How many homes will be flooded, how many people will die of thirst or starvation because of our activities? ’ These are not comfortable questions, but, by God, they need to be asked. ”
He added, “At the moment these costs do not appear in anyone’s books… Yet they are real, they are incurred now and in a relatively short time, the damage being caused may be beyond remedy. ” He said the world was “running up the biggest global credit card debt in history, but with little or no thought for how the bill will ever be paid”.
Flanked by the prime minister and business and community leaders at St James’ Palace, the prince said his new “accounting for sustainability” project would give consumers the power to choose products that caused less damage to the planet.
Duchy Originals, the prince’s food company, is taking steps to work out how much carbon dioxide and other green-house gases are emitted in growing, processing and distributing its products. The changes to the prince’s travel arrangements announced yesterday are part of a wider review of the carbon footprint associated with activities at all three of his residences. Clarence House in London, Highgrove and Birkhall on the Balmorals estate(庄园), as well as the activities of his 21 personal and 105 full-time staff. Measures include a review of electricity use, commuter and other staff travel and are intended to identify further reductions in carbon dioxide emissions. The review will report in June , when Clarence House will announce annual targets to reduce carbon emission.
【小题1】How does Prince Charles feel about business leaders in terms of environmental protection?

A．Dissatisfied.	B．Disappointed.
C．Doubtful.	D．Impatient.

【小题2】In response to Prince Charles’ calls, Duchy Originals will ______.

A．make as much green food as possible

B．cut down its cost

C．figure out its greenhouse gas emission

D．continue its greenhouse gas emission

【小题3】The underlined phrase in paragraph 4 probably refers to ______.

A．the great amount of waste produced by industry

B．the great damage caused to the environment

C．the great amount of debts of the royal family

D．the high cost of industry in their producing process

【小题4】What would be the best title for the passage?

A．Prince Charles promised Greener Royal Lifestyle

B．Better Late than Never

C．Prince Charles and His Concern for Environment

D．The Royal Family Has a Role to Play in Environment Protection

Not long ago , Richard Denniston found himself suffering the same pain that millions of other pet owners have faced . His little Scottish dog had a brain tumor（肿块）and would soon die. Like others who faced the problem before him , Denniston just wanted to end his pet’s suffering . However , he took one step further.

Deniston , an expert who studies animals , collected a tiny skin sample from the dog and took it to his laboratory at Louisiana State University. There he cultivated it and froze it in liquid nitrogen.

From that idea , Denniston started a new technology .Denniston’s company will save pet’s DNA ＄500，plus a monthly storage fee of Us ＄10, until cloning becomes a reality .

Thanks mostly to the contribution of a California multimillionaire , that day may not be so far off.

“It could happen extremely soon if everything went on well.”says Mark Westhusin , a professor leading a dog cloning team . Most experts put successful dog cloning a year to five years down the road . The cost is bound to be expensive at first , but it would eventually drop to a few thousand dollars.

Since Dolly , the sheep which was first cloned in 1997 ,cattle ,goats ,mice and monkeys have been cloned in labs . Pets are likely to be next.

“I really believe that the technology is going to become available for many species in the near future ,”Denniston says .

1. After his pet died ,Richard Denniston_______.

A. did something more than the ordinary pet owners

B. did as other pet owners

C. did nothing but feel very sad

D.could not help feeling lonely without his dear pet

2. Richard Denniston_________in liquid nitrogen for an experiment.

A. was a doctor who put his dog

B. was an animal expert who put a piece of his dog’s skin

C.was an expert at collecting skin samples who then put them

D.took great interest in freezing things

3. The underlined word “cultivated ”in Para . 2 probably means_________.

A. bought B.discovered C.caught D.trained

4. Cloning will cost people_______.

A. a lot of money in five years .

B. much in the beginning and then be reduced to a thousand dollars.

C. much and then will surely be reduced to thousands of dollars.

D.much at first and then might be reduced to a few thousand dollars.

In the eyes of dog lovers, the dog is man’s best friend. But for much wildlife, loose dogs may be a dangerous enemy, according to a study by a biologist from Utah State University in the US.

Based on much existing research and their own case studies, Julie Young of Utah State University and four other scientists conclude that loose dogs may represent a huge danger to wildlife, especially endangered species, by hunting down or worrying them and by spreading diseases. They also found that dogs, their worldwide numbers around 500 million, can cause more damage to wildlife and livestock(牲畜) than wolves and other enemies of these animals.

Young gave examples from the US state of Idaho, where research showed the presence of dogs reducing some deer populations. On the Navajo American Indians’ reservation in northeastern Arizona, packs of loose dogs are chasing livestock. They have killed populations of small animals such as rabbits and act as a disease carrier for rabies(狂犬病) among people and other animals, she said. Loose dogs also were to blame for distemper outbreak leading to a die-off of endangered black-footed ferrets in northwestern Wyoming in the 1980s.

The phenomenon is not just limited to US; it’s a global problen. Julie Young once studied three endangered species in central Asia: wild sheep, gazelles and antelope. The rate of injury and death to these animals by loose dogs was very high. In another case, Young found that dogs, not wolves, as originally suspected, were responsible for a large number of livestock killings in the mountainous Basque country between Spain and France.

Authors of the new study said the problem is likely to worsen as communities expand. Then how to deal with it?

Indeed, in many countries, leash(拴狗的皮带) laws permit punishment of dog owners whose pets chase wildlife. But lawbreakers are rarely punished because the police lack both people and money.

Young has low-cost solutions to the problem for dog lovers, though. They include public dog-training programs and vaccinating (预防接种) dogs against rabies and other illnesses.

1.. What is the main point of Julie Young’s study?

A．Many species are endangered because they are killed by loose dogs.

B．Wild dogs are immune to many diseases.

C．Wolves are still the greatest enemy of livestock.

D．Loose dogs pose a great danger to wildlife.

2.. Which of the following statements about loose dogs is TRUE according to the research?

A．There are around 500 million loose dogs around the world.

B．The black-footed ferrets in northwestern Wyoming were once the main food source of local loose dogs.

C．The problem caused by loose dogs is the most serious in the US.

D．People used to think that wolves, rather than loose dogs killed livestock in the Basque country.

3.. Which of the following is among Julie Young’s solutions to the trouble caused by loose dogs?

A．More strict leash laws

B．Public dog-training programs.

C．Vaccinating people against rabies and other illnesses.

D．More support from the police.

4.. What is the main point of the article?

A．A global disaster caused by loose dogs.

B．What makes the dog man’s greatest friend.

C．The problem of loose dogs and the possible solutions.

D．The danger of the increasing numbers of dogs.

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