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    精英家教网 > 高中英语 > 题目详情
    The past 30 years__________ the great changes that have taken place in my hometown.
    A．sawB．was seenC．have seenD．see
    C

    试题分析：表示过去的某一动作或行为一直持续到现在，故用现在完成时。
    点评：现在完成时可以表示动作发生在过去，但一直持续到现在，并且有可能持续下去。
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