Oraciones con past progressive in interrogative from?

1. They weren't talking to Frank when the visitor came.

2. They weren't walking the dog when a wolf attacked.

3. He wasn't running with Susan when the tornado came.

4. We weren't talking to Frank, when the accident happened.

5. She was talking on the phone while doing exercises.

6. I was walking down the street when I saw him.

7. You were dancing with him on the disco.

8. He was smiling to her all night long.

9. She was jogging when she bumped on him.

10. Tom was travelling when he got the information about his mother´s death.