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    精英家教网 > 高中英语 > 题目详情
    1．Coal has beenreplaced（代替） by gas in some big cities．

    分析 在一些大城市里，煤炭已经被天然气所代替了．

    解答 答案：replaced
    由于句中的谓语部分符合"has/have+been+done"的结构，故此处考查的应是现在完成时态的被动语态；结合句中给出的汉语部分可知，这里应填动词replace的过去分词形式；故答案为：replaced

    点评 本题考查了单词拼写．做本题时，首先结合题干中给出的汉语意思，然后从语法分析的角度去判断句中所填单词的形式；另外，在平时的学习中，需要积累一定的词汇量，牢固记忆单词的拼写，并且熟练掌握各类词法，句法等语法知识．

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