Past Perfect, Past Perfet Continuous , Past Simple 13--20
13. woke up, looked, was, had been snowing 14. looked, had passed 15. admitted, had made, apologized 16. sent, had made, had been attending 17. ran, had used 18. got, heard, had cancelled 19. saw, was doing, was 20. had been working, dropped
13 woke up, looked, was, had been snowing 14 looked, had passed 15 admitted, had made, apologized 16 sent, had made,had been attented 17 ran, had used 18 got, heard, had cancelled 19 saw, had done, was 20 had been working, dropped 21 ran, was