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    精英家教网 > 高中英语 > 题目详情
    16．Over the past decades，the freeway network in Chinahas been expanded （expand） greatly．

    分析 在过去的二十年里，中国高速公路网络已经得到极大的扩张．

    解答 答案：has been expanded
    根据句子里的时间状语Over the past decades，确定句子时态为现在完成时，再根据语境the freeway network 和expand之间是被动关系，故用has been expanded．

    点评 对于单词短语的识记，要从词义着手，理解词性和常见用法或搭配，并能在语境中灵活运用．

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