在“one of +名詞(復數)+關系從句”中的單復數在“one of+名詞(復數)+關系從句”中，關系從句中的謂語動詞常采用復數形式。

【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等修飾語時從句動詞要用單數。

【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.