2. were eating
3. went, bought, read
4. were watching, heard
5. was, arrived
6. What were you doing, was cleaning
7. visited
8. were having, came
9. was working, found
10. was studying
11. was walking, met
12. was, was falling, were singing, were doing
13. was, always misses, arrives
14. called, was working
15. were you crying, arrived
16. got
17. was sitting
18. was enjoying, didn't notice
19. wasn't sleeping, arrived, was studying
20. wasn't working
