Here are the completed sentences:

1. I really like **swimming** - especially in the sea.
2. I'm interested in **photography**. My favourite band is T-ara from Korea.
3. I love **films**. I go to the cinema every weekend.
4. I really like **music**. I don’t play it, but I watch matches on TV.
5. My hobby is **photography**. I have a new camera.
6. I love **books**. My favourite writer is To Hoai.
7. I really love **skating** in the park with my friends.
8. I like **chess**. I play against my dad. I also play against other people on the Internet.