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    20．No official（官方的） permissionhas been given for the event to take place．

    分析 这项活动没有官方允许，不能进行．

    解答 permission    permission是一个名词，意为"允许，批准"，official是形容词，后加名词．本句主语是permission，has been given是被动语态，表示"允许是被给的"．
    take place 意为"发生，举行"．

    点评 考查名词的词义．在熟知单词词义的基础上要注意词性的修饰．

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