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    11．There is nothing wrong with surfing the Internet _____ it doesn't keep you from doing
    something important．（　　）
    A．untilB．unlessC．thoughD．if

    分析 上网没有错，只要不耽误你做重要的事．

    解答 答案：D 题干中前面There is nothing wrong with surfing the Internet表达肯定的意思，后面it doesn't keep you from doing something important表达也是肯定，可以知道是条件关系．故选D．

    点评 连词用来连接从句．按照类型可分为：从属连词，连接代词，连接副词．学习时，要注意区分和掌握．本题考查的是条件状语从句．

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