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    精英家教网 > 高中英语 > 题目详情
    16．Schools in the cities are well equipped        those in the countryside are poor．（　　）
    A．ifB．whileC．soD．as

    分析 城市里的学校都配备地很好，然而乡村的学校却配备地很差．

    解答 答案B．
    if从属连词，意思是"如果"，引导条件状语从句；while作并列连词时，意思为"而，然而"，表对比；so是表示因果关系的并列连词，意思是"因此"；as从属连词，作"因为"时，引导原因状语从句，作"随着"时，引导时间状语从句．根据上下文语境"Schools in the cities are well equipped"和"those in the countryside are poor"可知是城市里的学校的装备情况和乡村的学校装备情况的比较，故答案选B．

    点评 本题考查从属连词的用法．连词的用法辨析，要注意分析主从句之间的关系，再确定相应的连词，同时注意不同的连词的语义及用法区别．While作并列连词用，意思为"而，然而"，表对比．而but表转折．
    注意用心比较体会while与but的句中用意．
    1．Some people waste food while others haven't enough．有些人很费粮食，然而有些人却吃不饱．  
    2．The son was having a good meal at home，while the parents were working in the fields．儿子在家吃好饭而父母却在田里辛勤劳作．  
    3．I ought to have helped her，but I never could．我本该帮她但没能．  
    4．Honey is sweet，but the bee stings．蜂蜜很甜，但蜜蜂有刺蜇人．

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