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    精英家教网 > 高中英语 > 题目详情
    16．A good teacher must be able to hold his students'attention ____ he reaches the end of the class．（　　）
    A．whenB．afterC．untilD．unless

    分析 一个好老师必须能够抓住学生的注意力，直至一堂课结束为止．

    解答 答案为C 
    解析：本题考查时间状语从句中连词的选择，主句为A good teacher must be able to hold his students'attention，一个好老师必须能够抓住学生的注意力；从句__he reaches the end of the class，___他结束一堂课，空格处缺少适当的连接词，根据分析，缺失的连词意思为：直至，直到，结合各个选项意思，A when 当…时； B after 在…之后； C until 直到…为止； D unless 除非，故选C．

    点评 本题考查时间状语从句中连接词的选择，学生应该掌握各个连接词的词意．

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