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1. While Tom was reading, Amely was watching a documentary on TV. 2. Marvin came home, switched on the computer, and checked his emails. 3. The thief sneaked into the house, stole the jewels, and left without a trace. 4. Nobody was listening while the teacher was explaining the tenses. 5. While we were doing a sight-seeing tour, our friends were lying on the beach. 6. He woke up and looked at his watch. 7. The receptionist welcomed the guests and asked them to fill in the form. 8. The car broke down and we had to walk home. 9. The boys were swimming while the girls were sunbathing. 10. My father came in, looked around, and told me to tidy up my room. 11. As long as one group was preparing dinner, the others were collecting wood for their campfire. 12. While the parents were having breakfast, their children were running about. 13. Martha turned off the lights and went to bed. 14. When I was doing the washing-up, I broke a plate. 15. While Tom was playing the piano, his mother was doing the washing-up. 16. He drank some juice and then he ate a few chips. 17. I was having dinner when I suddenly heard a loud bang. 18. When my father was working in the garden, an old friend passed by to see him. 19. She went to school, took out her textbook, and began to learn. 20. When it started to rain, our dog wanted to come inside.