III. Choose the best answer:
1. couldn't
2. Will
3. May
4. will have to
5. could
6. have to
7. may
8. May
9. had to
10. couldn't
IV. Complete the following sentences with the suitable form of verbs
1. establish
2. told
3. be wrapped
4. forgotten
5. participate
6. been replaced
7. scrub
8. be worn
9. be polluted
10. read