Answer :
The blanks can be filled in with the following aspects of Argentina:
1. saxofonista argentino: This could refer to Marcelo Torres, a renowned Argentine saxophonist known for his jazz performances.
2. las tres mayores ciudades de Argentina: Buenos Aires, Córdoba, and Rosario are the three largest cities in Argentina in terms of population and economic importance.
3. países de origen de muchos inmigrantes argentinos: Italy, Spain, and Germany are countries from which many immigrants to Argentina originated, contributing to the cultural diversity of the nation.
4. escritor argentino célebre: Jorge Luis Borges is a celebrated Argentine writer known for his works of fiction, essays, and poetry that have had a significant impact on literature.
5. países que comparten las cataratas del Iguazú: Argentina shares the Iguazú Falls with Brazil, creating a breathtaking natural wonder that attracts visitors from around the world.
6. primera dama argentina; nació en 1919: Eva Perón, also known as Evita, was a prominent Argentine political figure and philanthropist who was born in 1919 and served as the First Lady of Argentina from 1946 until her death in 1952.