问题
选择题
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
答案
答案：D
D这是一个定语从句。在one前是否有定冠词决定定语从句中的谓语动词的单复数形式：one of the students中的先行词是the students，定语从句中的谓语动词要用复数形式。the only one of the students中的先行词是the only one，定语从句中的谓语动词要用单数形式。又因“for three years”是完成时的标志。