My most famous schoolmate of all， who really left his mark on America，was Tom，my contemporary when I was at a primary school.A.oneB.the oneC.heD.someone
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B解析解析:the one作同位语，指代上文中的my most famous schoolmate of all。one作代词表示泛指，泛指某人或某物；he作主语，不作同位语；someone意为“某人”，泛指某人。故