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    D
    Global warming is the process of earth’s atmosphere heating up. Over the last 100 years, the average temperature of earth’s atmosphere has gone up 1 Fahrenheit. The weather has not changed exactly the same way in every area of the planet. But scientists think that the rise in average temperature is already affecting the earth’s climate.
    Many scientists now believe that global warming is caused by cutting down trees, producing more trash, and polluting the environment are some of the reasons that the temperature has gone up. Many scientists believe that the biggest causes of global warming are new human technologies that release greenhouse gases into the atmosphere.
    The greenhouse effect is not new. Certain gases in the atmosphere, like carbon dioxide, nitrous oxide and methane, prevent heat energy from escaping back into space. In the past, the climate didn’t change much because nature produced just the right amount of greenhouse gases to deal with it.
    Today, most scientists are pretty sure that the rising temperature can’t be blamed on nature. Ever since the industrial revolution in the 1700s, humans have relied on machines for daily life. And many of those machines give off a lot of greenhouse gases. An increase in the release of greenhouse gases from human activities is throwing nature off balance.
    The climate is a very complicated thing, but many scientists agree that the rising atmospheric temperature has already damaged the environment. Sheets of ice, called glaciers, are melting in Antarctica and other parts of the globe. As glaciers break off and melt into the oceans, they are adding warm water to the oceans and causing the sea level to rise.
    Over the past last 100years, the sea level has risen 6-8 inches around the world. That means land along the coasts is beginning to disappear under water. Bigger and warmer oceans are also adding to other weather problems caused by pollution in the atmosphere. Some places have received more rain, others have had bigger storms and a few areas in the world have experienced unusual droughts.
    68. What is mainly talked about in this passage?
    A. The melting of glaciers.                B. Global warming.
    C. The world’s weather.                  D. The earth’s temperature.
    69. What causes global warming according to scientists?
    A. Human activities.                     B. The nature itself.
    C. The earth’s atmosphere.                D. New discoveries
    70. How can greenhouse gases make the globe warm?
    A. They keep heat in the atmosphere   
    B. They let the heat go out into space.
    C. They release heat into the air.       
    D. They can make the other gases warm.
    71. From the passage we can see that global warming will bring about _________.
    A. the pollution in the atmosphere            B. natural disasters
    C. population pollution                     D. the rise of glaciers

    68---71   BA AB  
    略
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    科目：高中英语 来源：不详 题型：阅读理解

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    科目：高中英语 来源：不详 题型：阅读理解


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    科目：高中英语 来源：不详 题型：阅读理解


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    科目：高中英语 来源：不详 题型：阅读理解


    D
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    科目：高中英语 来源：不详 题型：阅读理解


    第三部分　阅读理解（共两节，满分40分）  
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    阅读下列短文，从每题所给的四个选项（A,B,C,和D）中选出最佳选项，并在答题卡上将该项涂黑。
    A
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    科目：高中英语 来源：不详 题型：阅读理解

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    科目：高中英语 来源：不详 题型：阅读理解


    B
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    Sony M400  $115
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    Imperial OEM MC7  $ 29.95
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    Philips 585  $80
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    A. Pearlcorder S 702   B. Sony M9  C. Sony M400  D. Philips 585
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    科目：高中英语 来源：不详 题型：阅读理解


    D
    The eruption of a volcano in the Canary Islands could trigger a “mega-tsunami”（巨大海啸）that would hit Atlantic coastlines with waves as high as 330 feet, scientists said on Wednesday. They said an eruption of the Cumbre Vieja volcano on La Palma, part of the Spanish island chain off West Africa, was likely to cause a massive chunk（大块）of rock to break off, crashing into the sea and kicking up huge walls of water higher than any other in recorded history. The tsunami would be capable of traveling huge distances at up to 500 miles an hour, the scientists said in a research paper to be published soon.
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    76. What would be the result of a big chunk rock falling into the sea?
    A. Waves would be very high.                                         B. The volcano would stop.
    C. Walls of water would kick up a storm.                          D. An earthquake would take place.
    77. The word “negligible”(Line 3, Paragraph 2) is closest in meaning to ______.
    A. unimportant                    B. small                              C. predictable               D. avoidable
    78. From the passage we may learn that the volcano erupts ______.
    A. every year                                                                 B. every 5 to 9 years
    C. every 10 to 100 years                                                        D. every 5 to 10 months
    79. All of the following are true EXCEPT ______.
    A future eruption of Cumbre Vieja volcano may experience a massive collapse
    Waves generated by the landslide could even reach the coasts of the United States
    The landslide-released energy is equal to half a year’s electricity consumption in the US
    American scientists have managed to utilize the volcanic energy for civil purposes

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