Переделать с активного залога в пасивный they think the president is dying

The president is thought to be dying.

1. have you seen him since he left leningrad? 2. he has already returned? - yes, he returned three days ago. 3. i have never seen this man. 4. how many english books you read lately? 5. he just left. 6. i lost the key to the apartment, and now i can not get there. 7. they do not clean the room for a week. 8. i bought an interesting book. want to read it? 9. someone broke a window in the room and now ho-lodno. 10. i forgot his phone and now i can not call. 11. i left my watch at home and i can not tell you to-else hour. 12. son of my sister's only four years old, but he has learned to read. 13.i never even sly-shala. 14. you have now moved to a new apartment? 15. you made a lot of mistakes in the dictation. 16. this month, i read three english books. 17. my friend went to brighton a week ago and still has not. 18. i have not seen him lately. 19. where did you put my hat? i have been unable to find it. 20. all came from, you can start a collection. 21. i've come to talk with you. 22. you understand the rules? 23. did you read today in the newspaper article about our institute?