Răspuns:
1. While I was using my computer, I heard a strange noise.
2. The salesman walked up the steps, rang the bell and waited.
3. The burglar broke in while Bob was working on his in the garage.
4. She gave me the keys to the new office as I got ready to leave.
5. Did you write to her while she was working abroad?
6. We did not/didn't notice anything unusual while we were checking the morning post.
7. Did she study at university when she decided to become an actor?
8. We were not/weren't watching television when he called. We were eating.
9. Did you see many places while you visited your friends in LA?
10. She did not/didn't sign a contract after she left college.
