One of ()Beijing opera is very interesting

题目

One of ()Beijing opera is very interesting
题目请看标题.有四个选项.
students think
the students think
the student thinks
them
应该是哪一个?为什么?

答案

我觉得应该是them
因为主语student本来就是学生的复数,不能在后面加s,既然主语student是复数（不是第3人称单数）,那动词就不该加s
个人意见哈!