Complete these sentences using the Past Continuous or the Past Indefinite.
1. When we went out … 2. Who were you talking to …? 3. It was raining … 4. When I got to the lesson … 5. I was ringing the doorbell when … 6. When I opened the door … 7. While Mary was playing the piano … 8. … his father was sleeping. 9. When I arrived home … 10. All day long yesterday … 11. On Sunday morning … 12. … I was resting. 13. While John was swimming … 14. This afternoon … 15. From 5 till 6 on Friday … 16. When I got up … 17. While I was talking to my friend … 18. The whole month … 19. … yesterday morning. 20. I was having tea …