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    Environmental problems are becoming more and more serious all over the world. For example, cars have made the air unhealthy for people to breathe and poisonous gas is given off by factories. Trees on the hills have been cut down and waste water is being poured continuously into rivers. Furthermore, wherever we go today, we can find rubbish carelessly disposed.
    There are different kinds of pollutants, each of which comes from different sources. It is necessary to identify the source of pollution, in order to make a policy to eliminate them.
    Different products, processes and activities of our industrialized world together form the major source of pollution. The forms of pollution can be mainly divided into three kinds—solid, liquid and gas.
    These pollutions have greatly damaged our planet and continue to do so. In fact, pollution is threatening our existence. The whole ecological balance of the earth is changing. Massive destruction of environment has brought about negative effects and even posed a great threat to man’s existence.
    We must face the situation that exists and take action to solve our environmental problems. For instance, new laws must be passed to place strict control over industrial pollution, the public must receive the education about the danger of pollution and so on.
    The earth is our home and we have the duty to take care of it for ourselves and our later generation. Fortunately, more and more people have realized these problems. Measures have been taken to deal with these situations by the government. Laws have been passed to stop pollution, I hope the problems will be solved in the near future and our home will become better and better.
    小题1: How many examples of environmental problems are given in the first paragraph?
    A．2 B．3 C．4 D．5
    小题2: Which of the following is TRUE according to the passage?
    A．In all there are three kinds of pollution
    B．If people continue to pollute our planet, there will be no trees.
    C．Industrial pollution has been completely controlled.
    D．Laws have been passed to stop pollution and protect our environment.
    小题3: The sentence “We hope that all these measures will be effective and bring back a healthy environment” can best be put at the end of paragraph _____.
    A．2 B．3 C．5 D．6
    小题4: The writer’s attitude towards the future of the earth is _____.
    A．despair B．negative C．optimistic D．hopeless

    小题1:C
    小题2:D
    小题3:C
    小题4:C

    试题分析：本文叙述了全世界的环境问题变得越来越严重，事实上，污染正威胁我们的生存。政府已经采取了很多措施去解决这些环境问题，法律已被通过以制止污染。我们希望这些措施的有效实施能带给我们一个健康的环境。
    小题1:细节理解题。根据cars have made the air unhealthy for people to breathe and poisonous gas is given off by factories. Trees on the hills have been cut down and waste water is being poured continuously into rivers. Furthermore, wherever we go today, we can find rubbish carelessly disposed.汽车污染引起的大气污染；山上的树木被砍伐；污水进入河流；垃圾被随意地处理，这四个方面的环境问题，故选C。
    小题2:细节理解题。根据Laws have been passed to stop pollution, I hope the problems will be solved in the near future and our home will become better and better.已经通过法律的手段来阻止环境的污染，故选D。
    小题3:推理判断题。根据We must face the situation that exists and take action to solve our environmental problems. 这是本段的中心句，我们要面对存在的形式，采取措施解决我们的环境问题，最后都希望这有效的措施能还给我们一个健康的环境，故选C。
    小题4:推理判断题。根据Laws have been passed to stop pollution, I hope the problems will be solved in the near future and our home will become better and better.可知作者对未来的环境充满希望，故推出作者是以乐观主义的态度，故选C。
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