Respuesta:
1. You can't talk Jack at the moment. He is having (have)a guitar lesson.
2. We go out of (go out)a pizzeria for Kirsty's birthday next week.
3. I can't wait. We will go (go) on holiday tomorrow.
4. someone is ringing the bell. Wait here and see (see) who it is.
5. We eating (eat) dinner when Rebecca called.
