Fill in the prepositions.

1. My sister bought a bike for her birthday. 2. The first floor in the USA is called the ground floor in the UK. 3. After school, I usually play with my friends. 4. We always go to my grandparents' house at Christmas and Easter. 5. Greg broke his leg three days ago. 6. My friend lives on the twelfth floor. 7. My little sister doesn't go to school yet.