Solution:
- 1. I went to a film festival. - e. Did you?
- 2. I can't sing. - f Can't you?
- 3. I like opera. - a Do you?
- 4. I've got a new guitar. - c Have you?
- 5. I'm listening to Shawn Mendes. - b Are you?
- 6. I was enjoying the concert. - d Were you?
Explanation: These are common ways to respond to statements, either agreeing, showing surprise, or asking for confirmation. The choice of auxiliary verb (do, can, have, be) depends on the verb in the original statement.