1. had, made, decided, got, sat, began, was writing, came, gathered, barked, flew, made, decided, picked up, found, continued, remembered, stood up, went, returned, saw, was listening, got, thought, was.
2. 1. was... doing, called
2. was watching, went
3. arrived, was
4. was writing, heard
5. had, played, met
6. were sleeping, were listening
7. opened, was snowing
8. was enjoying, was swimming
9. were... checking, entered
10. saw, was wearing
