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    精英家教网 > 高中英语 > 题目详情
    6．_______many people are excited about GM food，these technologies frighten others．（　　）
    A．WhileB．WhenC．IfD．Unless

    分析 尽管许多人对转基因食品感到兴奋，但这些技术却使其他人害怕．

    解答 答案：A．根据many people are excited about GM food可知许多人对转基因食品感到兴奋；根据these technologies frighten others可知这些技术却使其他人害怕，因此前后句之间是转折对比关系，所以答案是A while表示"虽然，尽管"．其他选项的含义分别是B"当…的时候"；C"如果，是否"；D"除非"．

    点评 考查从属连词．【while的用法】
    （1）引导时间状语从句，从句中的谓语动词应用延续性动词或表示状态的词．
    eg．While the discussion was still going on，George came in．当讨论还在进行时，乔治走了进来．
    （2）引导让步状语从句，多用于句首．意为"尽管，虽然"．
    eg．While I admit his good points I can see his bad．尽管我承认他的长处，但我也看到了他的不足．
    （3）While作并列连词用，意思为"而，然而"，表前后意义上的对比或转折．
    eg．There's plenty of rain in the southeast，while there's little in the northeast．东南部雨量充足，而西北部则很少下雨．

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