Ответ:

1. We weren't writing letters to parents at 18:00 o'clock.

2. Was Blondin standing on the tightrope at 21:00 o'clock?

3. Andrew wasn't texting friends by the phone at 14 o'clock.

4. Were Tim and Sam watching a DVD in his room at 5:00 o'clock?

5. At 17:00 o'clock Ammie was becoming the first woman daredevil.