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星期一早晨,我走进办公室,意外地发现学生的数学家庭作业还没有送来。怎么回事?数学科代表小梅一向挺能干,挺负责的,今天怎么啦?莫非……
On Monday morning, I walked into the office and accidentally discovered that my math homework was not delivered yet. What happened? Xiaomei mathematics section has always been capable, very responsible, what happened today?