1. came, was having
2. returned, was listening
3. entered, was drawing
4. came in, was doing
5. was airing, caught
6. met, was going
7. was washing, knocked
8. were dancing, came
9. was washing, broke
10. What were they doing ... saw ... ?

Ответ:

1.came,was having dinner

2.returned,was listening

3.entered,was drawing

4.came in, was doing

5.was airing, caught

6.met,was going

7.was washing,knocked

8.were dancing, came

9.was washing, broke

10.were they doing, saw