Объяснение:
1. You were talking on the phone when he came.
2. She was buying a cake at 3 o’clock yesterday.
3. Molly was showing the city to the tourists at 6 o’clock yesterday.
4. They were skiing when it started snowing.
5. The dog was sleeping while the cat was eating.
6. I was watering the flowers while my brother was cleaning the floor.