1. opened / were sitting
2. were discussing
3. found / was reading
4. swept
5. was sweeping
6. were sailing / saw
7. were working
8. was playing / came
9. came / was waiting
10. went
1. opened / were sitting
2. were discussing
3. found / was reading
4. swept
5. was sweeping
6. were sailing / saw
7. were working
8. was playing / came
9. came / was waiting
10. went