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    7．This kind of medicine is for external use only．It cannot be taken by mouth．

    分析 这种药只能外用，不能口服．

    解答 答案：external
    根据句意以及首字母的提示可知，此处的意思是：外用的；由于此处用来修饰名词use，故用形容词external．

    点评 做首字母填空题时，可根据句意以及首字母的提示判断出空缺处的意思，从而确定出要填的单词；然后从语法分析的角度，确定出应填单词的形式；因此在平时的学习中，除了应牢固记忆单词的拼写之外，还要熟练掌握一些语法知识．

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