Answer:
"mi" or "nuestra" The one you want to use
Well id have too see the blog post and the video too help out i'm fluent in spanish so id be able to help out :)
Answer for part 1:
Cosas Antiguas:
1. Pirámides
2. Ruinas
3. Calendario azteca
Cosas Moderna:
1. Acero
2. Semáforo
3. Rascacielos
Answer for part 2:
1.los toltecas
2. civilizaciones
3.herramientas
4. Ciudades
5. excavaciones
6.ruinas
