分类：教育/科学-外语学习-英语考试
问题：1Georgeisoneofthebrighteststuden? 
1 George is one of the brightest students who __f New York University.A is graduated B have graduatedC has graduated D had graduated解释一下.
回答：B   到目前为止,因此用完成时
    who引导的定语从句修饰的是 the brightestest students  为复数,所以选B 而不是C