填空题 When the author went back to an alumni reunion, an undergraduate student offered to help him across the street.

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【正确答案】 1、N    
【答案解析】[详解] 原文中提到了"several undergraduates called me 'Sir' and one of them asked me if he could help me across the street．”但这并不是“several undergraduates”的真正意思，事实上他们是“no courtesy and respect to old people．/