Question

He is the only one of the students who _________ a winner of scholarship for three years.

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

Answer 1

选择 D. has been
解析：
1、从定语从句中表语 a winner of scholarship，知道指的是一个人，关系代词应该指代 one，需要单数形式的动词与其保持一致。
2、从句中有表示从三年前一直到现在的时间状语 for three years， 应该用完成时态表示“三年来一直是奖学金的获得者”。

Answer 2

C
首先，本题考查的是one of 与 the only one of 的区别。前者选择be动词要用复数形式，后者用单三形式；其次，考查的是完成时与现在时的区别。这道题正好有一个时间段for three years，因此要用完成时，综合所述选择C。

Answer 3

D
who所指显然是he，he has been
他是唯一一个三年都拿奖学金的学生。

Answer 4

D. has been

Answer 5

D