подставьте глаголы в страдательный залог, там где требуется

Ответ:

1. is used

2. will be discussed

3. will discuss

4. was discussed

5. are built

6. be built

7. will be built

8. were built

9. are sold

10. sell

11. lock

12. is locked

13. was taken

14. will be taken

15. be taken

16. take

17. has taken

18. is taking