глаголы в начале задания: can, cannot,may,must,mustn't,should.
Answers & Comments
ChazzyChaz1976
1. must (но лучше бы have to) 2. may 3. had to (must не употребляется в прошедшем времени) 4. had to 5. could 6. can 7. had to 8. had to, couldn't 9. mustn't 10. may 11. can't 12. shouldn't 13. couldn't 14. needn't 15. shouldn't 16. was able to (=could) 17. cannot 18. needn't 19. have to 20. must 1. must 2. can't 3. can't 4. must 5. shouldn't (needn't)
Answers & Comments
2. may
3. had to (must не употребляется в прошедшем времени)
4. had to
5. could
6. can
7. had to
8. had to, couldn't
9. mustn't
10. may
11. can't
12. shouldn't
13. couldn't
14. needn't
15. shouldn't
16. was able to (=could)
17. cannot
18. needn't
19. have to
20. must
1. must
2. can't
3. can't
4. must
5. shouldn't (needn't)