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Ответ:

1. arrived, was writing

2. was crossing, saw

3. they were shouting, woke up

4. were fixing, opened

5. Was Mary broke, was skating

6. was sleeping, knocked

7. saw, wasn't talking

8. was watching, went

9. wasn't crossing, struck

10. wasn't fell, was running

11. fell, was reading

12. was driving, wasn't answered