题目内容
Last term our maths teacher set so difficult an examination problem _____ none of us worked out.
A. that B. as C. so that D. which
B
【解析】句意:上学期数学老师考试出题太难,没有一个人能解出来。as引导定语从句修饰"examination problem",在从句中作宾语,因其先行词前有限定词so。若看作"so…that…"结构,结果状语从句应加宾语,为"worked it out"。
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