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    6．Some people fear that ________ air pollution may bring about changes in _______ weather around the world．（　　）
    A．/； theB．the；/C．an； theD．the； a

    分析 有些人担心空气污染会在世界范围内带来天气变化．

    解答 答案：A．Air pollution 是抽象名词，这里是泛指，前面不加冠词；weather 这里是特指全球的气候，前面加定冠词the．

    点评 本题考查冠词，先明确定冠词和不定冠词的用法区别，再结合句意和一些特殊用法选择适当答案．

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