Ответ:
1. He has not been invited to the wedding yet.
2. The Hermitage is visited by thousands of tourists daily.
3. A new hospital had been completed by next month.
4. In Russia the Presidential elections are held every 6 years.
5. The boy has been treated for minor knee injury since the weekend.
6. He is believed is being slept at home right now.
7. Next month a new hospital will be built.
8. Most accidents is caused by careless drivers.
9. I think there's someone behind us. - Yes, we are followed.
10. I don't like to tell what to do!
(П.с. странное задание,тут не везде пассивный залог подходит,как вы написали)
Объяснение: