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    20．The schools are supposed be run on the     principle that each child should develop its full potential．（　　）
    A．concreteB．convenientC．formalD．fundamental

    分析 学校的经营管理应该以全面发展每一个孩子的潜能为基本原则．

    解答 答案D．
    考查形容词辨析．concrete实在的，具体的；convenient便利的；formal正式的；fundamental基本的，根本的，根据句意可以推断出D为最佳答案，"基本原则"．

    点评 本题考查形容词词义辨析．形容词使行文更加形象，熟悉选项的含义，结合语言环境选出最符合题意和语言习惯的表达．

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