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    6. One visitor’s words are quoted in the text in order to show _________________.

    A.　　 that the Earth Summit is very popular among ordinary people

    B.　　　 that we could help save the earth by changing their way of life

    C.　　　 how we can develop the world without damaging the environment

    D.　　 how people can stop the death and suffering caused by the big three

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    5. At the summit, China’s then Premier Zhu Rongji probably mentioned the following EXCEPT ____________.

    A.　　 international cooperation　　　　　　　

    B.　　　 sustainable development

    C.　　　 ways of preventing ADIS from spreading

    D.　　 equality and fairness in the world

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    4. Most of the deaths caused by air pollution happen in the countryside mainly because __________________.

    A.　　 the environment is badly being damaged

    B.　　　 wood and coal are widely used in rural areas

    C.　　　 a large of part of forest has been cut down

    D.　　 it’s a big problem in developing countries

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    3. According to the text, air pollution alone cause about _________ of all the deaths in the world.

    　　 　　 A. 6.5　　　　　　 B. 15%　　　　　 C. 20%　　　　　 D. 35%

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    2. In the text, the ‘big three’ are __________________.

    A.　　 water, health and air

    B.　　　 poverty, war, and violence

    C.　　　 contaminated drinking water, poor sanitation and air pollution

    D.　　 sustainable development, contaminated drinking water, and pollution

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    1. Which is TRUE about the Earth Summit?

    A.It’s held every 3 years in Stockholm, Sweden

    B. So far it has been held twice: in 1972 and in 2002

    C. ‘Sustainable development’ is the only theme of the summit

    D.At the summit people discuss how to take good care of the earth

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    5.　　　 What are the possible causes of the climate getting warmer? What can be done to stop it?

    Polar bears are getting thinner. It is not a diet and it is not because there is less food to catch. It is because the world is getting warmer.
    Giant white bears that live in the north of Canada are at the moment impatiently 　　(1)　　 　ice to form. They need the ice to form a "bridge" to their food - seals. Seals usually 　　(2)　　 　land among the icebergs. However, as the climate becomes warmer, winter is getting shorter and sea ice is decreasing in the area. This is making polar bears' lives increasingly difficult.
    Bears need to eat as much food as possible in the winter to make themselves fat enough to 　　(3)　　 　five months without food in the summer and autumn. During the five-month ice-free season, the bears 　　(4)　　 　fast (绝食). "For every week a bear has not been hunting food on ice, it is 10 kilograms lighter," said a scientist.
    The average temperature of the region has risen from 0.3 to 0.4 degrees centigrade since 1950. With the change of the climate, the sea ice is melting earlier in the spring. Thus the hunting season for bears is getting shorter. And the bears, 　　(5)　　 , weigh between 80 and 85 kilograms less than they did in 1985.

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    4.　　　 Besides polar bears, what other animals does the warming up have effect on?

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    3.　　　 Is it good for bears to get thinner? Are they going to die out?

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    2.　　　 Why are polar bears getting thinner?

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