Listen and check (✓) a or b. There is one example.
1. a. Yes, we did. We saw lots of old paintings.
b. You mustn't take photos in the museum.
2. a. I bought some great postcards.
b. There weren't any models.
3. a. I'm not sure.
b. It's a very large cave.
4. a. I'm playing volleyball.
b. No, you mustn't play on the grass.
5. a. My is running fast.
b. I think My is faster.