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    精英家教网 > 高中英语 > 题目详情
    As a teacher, I seldom give my students so difficult a problem_______ they can’t work out.
    A．thatB．asC．ifD．in order that
    B

    试题分析：句意：做为一名老师，我很少给学生他们做不出的很难的问题。这里是定语从句，先行词是so difficult a problem，定语从句中缺少宾语，如果先行词被as，so，the same修饰的话，用as引导定语从句，而且as在定语从句中做主宾表，选B。
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