在“one of +名词（复数）+关系从句”中的单复数在“one of+名词（复数）+关系从句”中，关系从句中的谓语动词常采用复数形式。
        【例如】She is one of the students who have passed Band Six.
        This is one of the best books that have been published recently.
        one之前有the only等修饰语时从句动词要用单数。
        【例如】She is the only one of the girls who is chosen as the member of student union.
        He was the only one of the boys who was given a prize.