Răspuns:
1. The Aztecs didn't use to grow rice. They used to grow cotton.
2. The Aztecs didn't use to keep cows and sheep. They used to keep turkeys and ducks.
3. The Aztecs didn't use to trade wood. They used to trade gold.
4. The Aztecs didn't use to make ships. They used to make pottery.
5. The Aztecs didn't use to build blocks of flats. They used to build pyramids.
Explicație:
used to (affirmative and negative)
