Ответ:
Удачи.
Объяснение:
1. Children were playing football when the spaceship landed.
2. Swimmers were swimming when the spaceship landed.
3. Builders were building when the spaceship landed.
4. A man was riding a car when the spaceship landed.
5. A baker was cooking when the spaceship landed.
6. A woman was using a phone when the spaceship landed.
7. A man was buying some food when the spaceship landed.