Раскройте скобки и поставьте в Past Simple или Past Continuous

4. When our guests … (arrive) we … (make) our salads.
5. Our granny … (fall) asleep while she … (read) a fairy-tale to us.
6. I … (find) my ring when I … (water) the flowers in the garden.
7. When father … (open) the door she … (play) computer games.