正确写法是“one of”。one of后面直接加可数名词复数，表示什么中的一个，动词用单数第三人称。oneof在句首时，谓语动词用单数。经典例句：China is one of the largest countries in the world.中国是世界最大的国家之一。
one of造句
1. Ben is one of the top students.
2. She is one of the best singers in China.
3. I am one of the best speakers in my class.
4. He is one of the fastest runners in the world.
5. Our school is one of the best schools in Shanghai.
6. I'm trying to be one of the spacewomen in the near future.
7. The man over there must be one of our new teachers.
8. He is one of the tallest students in our class.
9. My mother is one of the best teachers in her university.
10. I believe I will become one of the successful people sooner or later.