1. I was downloading some files when my computer broke down.
2. Did you talk on your phone during the lecture?
3. Why does your dog bark all night long?
4. I didn't sleep in the cinema. I just closed my eyes for a few moments.
5. While you two were talking, I finished preparing my presentation.
6. He met his wife when he was a student.
7. Did your students laugh when you told them the joke?
8. Samantha was writing an email when the manager called her.
9. We didn't know about the changes.
10. What were you discussing when I entered the room?
