分类：教育/科学-学习帮助
问题：EnglishHeistheonlyoneofthestuden 
He is the only one of the students who____a ner of scholarship for three years.          e    C.have been     D.has been
回答：选 D
　　who has been a winner of scholarship for three years是形容one of the students 的 
　　for three years 所以要用完成时
　　一个学生所以用单数