Polar bears are born in dens（洞穴）on land and their mother stays with them for the whole winter without eating anything．The mother and the babies emerge around March，famished from a long winter and must immediately go hunting to find food to stay alive．Now, the only hunting they know is to catch seals from floating ice in the open ocean．In March，polar bear mothers and cubs have to swim from the land in Spitsbergen to the edge of the polar ice cap．

      Normally this is a short swim，since in March the polar ice cap is very close to the land，and the polar bears，and even the babies，are good swimmers．However，last year we saw that the polar ice cap had really shrunk in size due to global warming

Swimming hundreds of miles，especially when they are hungry and have babies following them is really hard，and many bears are dying because of starvation．

The polar bear population in the Spitsbergen area was once threatened by hunters．In the 1970s，a ban on hunting was imposed and the polar bear population has been steadily increasing from just a few hundred to about 2，000 to 3，000．This was a great success story．However，now，because of global warming，the population is again in danger．If we do not stop making so much earbon dioxide。we will lose these beautiful animals forever．

The polar bears are just one example of animals that have become endangered because of man’s appetite for energy obtained by burning fossil fuels．All life on earth could be in danger unless we change our ways，What can we do? To reduce the amount of carbon dioxide in the air we must conserve and make energy without burning coal and oil．Instead，we can use the sun or the wind to generate electricity．We must also cut down on needless driving and turn things that use electricity off  when we are not using them．In addition，we have to stop cutting down forests and start planting more trees．

66．Why do the bear swim to the edge of the polar ice cap?

A．To get back to the ocean.                            B．To catch seals for food.

C．To get to a colder place．                            D．To teach their children how to swim．

67．What does the underlined word“famished”mean in this passage?

A．Hungry．               B．Thirsty．                C．Excited．               D．Tired．

68．Now that the polar ice cap is smaller，

A．it is easy for polar bears to find food            B．it takes them less time to catch seals

C．they have to swim farther to get to it            D．fewer seals will come to the shore

69．Many bears die in the ocean because

      A．they are not very good swimmers

B．they don’t have enough strength to swim to the polar ice cap

C．the number of seals has decreased so they can’t get enough food

       D．they are hunted by human beings

70．What does the last paragraph mainly tell us about?

A．The importance of protecting polar bears．   B．Ａway to make use of the solar energy．

C．Measures to protect our environment．        D．Damage done by burning fossil fuels．

Scientists in India have invented a new way to produce electricity. Their invention does not get its power from oil, coal or other fuels. It produces electricity with the power of animals. India has about eighty million bullocks. They do all kinds of jobs. They work in the fields. They pull vehicles through the streets. They carry water containers. Indian energy officials have been seeking ways to use less imported oil to provide energy. Scientists at the National Institute for Industrial Engineering in Bombay wondered whether the millions of bullocks could help. Many villages in India lack electricity, but they have many bullocks. And often the animals are not working. One job done by bullocks is to pump water out of the well. The animals do this by walking around and around in a circle. As they walk, they turn a heavy stick that makes the pump move. This simple technology is centuries old. Scientists thought that the same technology could be used to produce electricity. Bullocks walk in a circle only two or three times a minute. This is much too slow to produce electricity, but it can create enough power to turn a series of gears（齿轮）. A large gear sits next to a smaller gear. As the large gear turns, it causes the smaller gear to turn. That gear turns an even smaller one. Each gear moves faster because it is a little smaller. The smallest gear may turn extremely fast. Clocks operate with gears. So do cars and so does the device invented by the Indian scientists to produce electricity.

       According to the officials in the United Nations, the idea is being tested at several places in India. The device is easy to operate and repair. And it can be moved easily. It costs about three hundred and seven dollars now to make such a device, but production of large numbers of them could cut the cost of each to about two hundred dollars.

1．Who first thought of using bullocks to provide energy?

     A．Indian energy officials.                   B．Scientists in India.

     C．Officials in the United Nations.             D．Researchers in Europe.

2．The jobs that bullocks do in India are mentioned in the passage except         .

     A．pulling vehicles                                    B．harvesting crops

     C．pumping water out of wells                  D．carrying food baskets

3．In the sentence “This simple technology is centuries old” in Paragraph One, “This simple technology” refers to_____.

     A．using bullocks to produce energy

     B．using pumps to draw water out

     C．having bullocks walk around to make the pump move

     D．connecting gears of different sizes to produce electricity

4．Which of the following can NOT be inferred from the passage?

     A．Once widely used, this device can help reduce the use of oil to provide energy.

     B．Indian government has decided to put the idea into practice at once.

     C．This idea will make progress as it is environment-friendly to the people.

     D．This device is designed in the way as clocks work with gears working on each other.

5．What is the U. N. officials’ attitude towards the idea?

       A．Approving.          B．Doubtful.        C．Negative.      D．Passive.

As global warming continues to be a major concern for the future of our planet，people are starting to turn to green living practices to help save it for future generations．Green living involves every aspect of our daily life from driving to work to mowing（割草等）our lawns．

Making the switch to green living all at once might scare most people away from carrying out those earth-friendly changes．There are many ways to ease into this practice and still help save the earth’s environment．

Air pollution is a major problem for some cities．A lot of it comes from the factories, but that’s not the only way contributing to global warming．Automobiles give off a fair amount of pollutant（污染物）into the air．When you have a lot of cars driving around on the city streets, you’re multiplying the amounts of pollutant being emitted（发出）by each car that’s destroying our ozone（臭氧）．If you want to save the environment，you can start by either car pooling，walking more instead of driving or even purchasing hybrid（混合的）models that don’t do as much damage．

Then let’s take a look at your home．What kinds of bulbs are you using? The standard bulbs we use only contribute to higher electricity bills and more carbon dioxide．If you switch at least some of your standard bulbs with the compact fluorescent（荧光）bulbs，you can save the environment while saving on your electric bill．

Recycling is also an excellent way to save our environment．Try to buy as many products as you can that can be recycled．The less trash that has to be burned or buried into our soil，the better off our planet will be．

These small changes may seem that they couldn’t help much for the environment，but they can help tremendously．Every little bit we do is a much-needed step toward reserving（保留）natural resources for our future generations．

68．According to the first paragraph we can learn         ．

A．few people are concerned about the environmental problems

B．more and more people are interested in green living practices

C．what green 1iving practices in modern society are

D．green living practices don’t help in our daily life

69．Most people will be frightened if         ．

A．they are asked to do something to save the environment

B．they can’t drive to work any more

C．they are required to turn to green living completely at once

D．they are made to pay for the pollution they cause

70．In order to give off less harmful gas into the air, we can        ．

A．close all the factories that may cause pollution

B．limit the car production

C．forbid too many cars to run in the streets

D．choose those cars which may cause the least pollution

71．The author recommends recyclable products because         ．

A．they are made in green factories

B．they are cheaper than other goods

C．they will help to reduce trash on the earth

D．they can be used for a very long time

As we know, the earth's climate has changed over time. The present rate of climate change depends, in large part on human activities. Today, people all over the world are making everyday Choices that help the environment. Small actions matter. In other words, climate change is your business.

A woman in Nicaragua buys fluorescent light bulbs(灯泡) that are 80 percent more energy-saving than traditional ones. Many governments are now allocating money to encourage people to turn to energy-saving lights. Consumers are discovering that the new-generation bulbs help them save money in the long run.

Agriculture accounts for about 14 percent of global greenhouse gas emissions (排放) ,and transporting the food around adds to the environmental cost. There is a team of young vegetable growers in the United Kingdom who want to encourage kids to start planting their own fruit and vegetables.

A young lawyer wearing business clothes rides her bicycle to work in a large U.S. city. She’s been biking to work every day for the past two years and says it’s a lot easier than many people think. A recent study shows that more Americans bike or walk to work today than before.

A university student from southeastern China carries a reusable shopping bag to cut back on disposable (一次性) plastics. Some large shopkeepers have removed paper and plastic bags, and consumers are responding positively.

In Canberra, Australia, summers are hot and winters cold. To save electricity, Adam Wilson in Canberra uses an energy-saving heating system, and he keeps the temperature lower than he did in years past. He still makes it through the summer without air conditioning.

57. The passage mainly tells us that      .

A. climate change is concerned with everyone   

      B. the global warming is getting worse
   C. saving energy is of great necessity              

      D. humans are destroying the environment

58.  Why do the governments expect consumers to use the new-generation bulbs?

A. Because they are less expensive to buy.          

B. Because they will be used for a very long time.

C. Because they can save a lot more energy.   

      D. Because they can help consumers save money at once.

59.  What is consumers' attitude towards removing plastic bags from some big shops?

A. Opposed.                     B. Doubtful.                 C. Surprised.                 D. Supportive.

60.  We can learn from the last paragraph that      .

A.  the climate in Canberra is mild all the year round

B.   an energy-saving heating system will come into use

C.  Adam Wilson has a good habit of saving energy

D.  Adam Wilson is skilled in inventing the energy-saving equipment

C
Wind is the movement of air from an area of high pressure to an area of low pressure. In fact, wind exists because the sun unequally heats the surface of the Earth. As hot air rises, cooler air moves in to fill the gap. As long as the sun shines, the wind will blow. And as long as the wind blows, people will manage it to power their lives.
Ancient sailors used sails to capture the wind and explore the world. Farmers once used windmills to grind their grains and pump water. Today, more and more people are using wind turbines to make electricity from the breeze. Over the past decade, wind turbine use has increased at more than 25 percent a year. Still, it only provides a small part of the world's energy.
Most wind energy comes from turbines that can be as tall as a 20-story building and have three 200-foot-long (60-meter-long) blades. These devices look like giant airplane propellers(螺桨)on a stick. The wind spins the blades, which turn a shaft connected to a generator.
The biggest wind turbines generate enough electricity to supply about 600 U.S. homes. Wind farms have tens and sometimes hundreds of these turbines lined up together in particularly windy spots, like along a ridge. Smaller turbines set up in a backyard can produce enough electricity for a single home or small business.
Wind is a clean source of renewable energy that produces no air or water pollution. And since the wind is free, operational costs are nearly zero once a turbine is erected. Mass production and technology advances are making turbines cheaper, and many governments decrease tax to encourage wind-energy development.
Some people think wind turbines are ugly and complain about the noise the machines make. The slowly rotating blades(螺旋风片) can also kill birds and bats, but not nearly as many as cars, power lines, and high-rise buildings do. The wind is also changeable: If it's not blowing, there's no electricity generated.
Nevertheless, the wind energy industry is increasing sharply. Globally, generation more than quadrupled(四倍) between 2000 and 2006. At the end of last year, global capacity was more than 70,000 megawatts. In the energy-hungry United States, a single megawatt is enough electricity to power about 250 homes. Germany has the most installed wind energy capacity, followed by Spain, the United States, India, and Denmark. Development is also fast growing in France and China.
Industry experts predict that if this pace of growth continues, by 2050 the answer to one third of the world's electricity needs will be found blowing in the wind
63. According to the passage, which of the following statements is true?
A. The rotating blades can kill as many birds as high-rise buildings do
B. Single families are not encouraged to build turbines.
C. The USA produces more wind power than any other country in the world.
D. The noise the turbines make may discourage people from building them.
64. The underlined word “generator” in the third paragraph probably means_______.
A. 电动机                 B. 发电机                    C. 机翼                       D. 飞机引擎
65. If the USA wants to build wind turbines in an area with 30,000 homes, how many
should they build at least?
A. 50.                          B. 150.                         C. 250.                         D. 200.
66. All the following are the advantages of wind energy EXCEPT that_________.
A. it is environmentally friendly                        B. it is free to build and operate
C. the government supports it                                   D. the energy is clean and renewable