one of teachers who 后跟谓语动词用什么形式

题目

one of teachers who 后跟谓语动词用什么形式
原句是 Mr.Green is the only one of the teachers who ___(know) France in our school.
说明原因

答案

“one of teachers who”应该是跟“know”
但是这句句子有“the only”,所以,后面是“knows”
the only 表示单数