Передайте следующие предложения в Active Voice. Введите любые подходящие подлежащие (где это требуется).

1. Invitations have been sent to all the conference participants.
2. The child is taken care of.
3. He wasn’t seen by anybody.
4. This book must be read by every student.
5. The letter will be mailed tomorrow.
6. The work wasn’t finished in time.
7. By the 1st of July the last exam will have been passed by them.
8. Which article was translated by your brother?
9. They were being taught drawing at that lesson.
10. This name was seldom mentioned in his novels.
11. His first book had been published by October.
12. Saint Petersburg was founded by Peter I in 1703.
13. When were the letters brought by a postman?
14. The newspapers are delivered every morning.
15. The research is being conducted by the outstanding scientists.