1.Its is the largest country in South America

2. It was the happiest day in my life

3. It’s the most valuable painting in the museum

4. It’s the busiest time of the year.

5. He is one of the riches men in the country

6. She’s one of the best students in a class

7. It was one of the worst experiences in my life

8. It’s one of the most famous university’s in a world.