He is the only one of the students who a winner of scholarship for three years.
A. is
B. are
C. have been
D. has been
网友回答
A. is
B. are
C. have been
(答案→)D. has been
解析：考查定语从句和主谓一致。定语从句的先行词是the only one，后面的定语从句中用单数，排除BC。再根据for three years可知这里应该使用完成时。句意：他是学生中唯一的一个三年一直是奖学金获得者得人。