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    13．Is this the reason         he gave us for the delay of the project？（　　）
    A．howB．whatC．whyD．that

    分析 这就是他给我们的推迟这项计划的理由吗？

    解答 答案：D
    题干中he gave us for the delay of the project是修饰reason的一个定语从句；从句中give缺少宾语（give sb sth），要用关系代词．故选D．

    点评 定语从句是用来修饰名词的形容词性从句，相当于一个形容词．连接定语从句的引导词分为关系代词和关系副词，关系代词在从句中要作主语或宾语；关系副词在从句中作状语．这也是选择关系词的一个判断方法．

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