1. opened, were doing, was reading
2. What did you do, studied
3. Did he arrive
4. Were they painting, came
5. was repairing, was working
6. were watching, went
7. is hanging, are washing
8. watered, started
9. was talking, arrived
10. was reading, called
11. were playing, came
12. entered, were listening
13. swept, was making
14. were sleeping, was playing
15. walked, were making
