练习册

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    Some people fear that air pollution may bring about changes in weather around the world. A. /; the B. the; / C. an; the D. the; a [答案]A 考查冠词用法.Air pollution 是抽象名词这里是泛指.weather 这里是特指全球的气候.根据the weather around the world 可知. 【查看更多】

     

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