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    精英家教网 > 初中英语 > 题目详情
    19．The Shanghai Expo            for 60days so far．（　　）
    A．opensB．has openedC．has been openedD．has been open

    分析 上海世博会到目前为止已经开展六十天了．

    解答 答案：D 根据for 60 days 可知，这是一个表示一段时间的时间状语，而open是瞬间性动词，不能持续一段时间，所以要用be open （延续性动词be+形容词open），它后面可以跟表示一段时间的状语；又因为关键词so far可知用现在完成时，现在完成时态的结构为have/has+动词的过去分词，主语是The Shanghai Expo，所以助动词用has，故选D．

    点评 本题要注意open的词性，它既可以是动词还能当形容词．

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