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Last term our maths teacher set so difficult an examination problem none of us w

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Last term our maths teacher set so difficult an examination problem none of us w

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

试题答案

B

标签：sosetandifficultteacher

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