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无法配对[文章来自:考试与评价 tSsL dAF==)VQR@]
Black and white[文章版权 禁止转载:考试与评价 01/9ov{R&Iq]Fz*gFroG]
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A policeman comes to the office with one black shoe and one white shoe.
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His boss starts to yell at him: "You are ruining police reputation, go home and change the shoes!"
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The policeman goes home, and comes back after a while.
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"Boss I have a problem, the other pair of shoes at home are black and white, too."
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