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    空氣污染（隱形殺手）

    [1.圖畫/圖表描述段] Pollution is becoming more and more serious all over the world. As is shown in the cartoon， two cars are giving off waste gas and three people are trying to avoid breathing in the poisonous gas by masking their face with their hands. The poisonous gas sent off by factories， domestic appliances and automobiles has made the air unhealthy for people to breathe.

    [2.意義闡述段] There is no denying that automobiles are indications of civilization， progress and development； nevertheless ， automobiles cause the serious problem of air pollution. Scientists have warned that unless effective measures are taken， the problem of pollution will eventually get out of hand. Actually， people are showing a real concern over the problem. For example， there is an increasingly loud voice from the public for firm action against pollution from automobiles.

    [3建議措施段]Indeed， the earth is our home and we have the duty to take care of it for ourselves and for our descendants. In my opinion， we should work out concrete solutions to the problem of pollution from poisonous gas given off by automobiles. For example， the automobiles should be equipped with a device which can dispose of waste gas so as to prevent it from polluting air. Only in this way can we really solve the problem of air pollution caused by automobiles.