The document discusses transportation on a farm from long ago when grandparents lived there, mentioning that there weren't any cars and people would ride horses or horse-drawn carriages, and describing how work was done on the land before tractors and how people would travel using buses or lorries.

1. Unit 16 There weren’t any cars

2. grandparents

3. farm

4. ride a horse

5. child

6. carriage

7. car

8. work the land

9. tractor

10. bus

11. lorry

12. pets