1. The homework is done by Mary in the evening.
2. The radio was invented by Popov in Russia.
3. The Christmas party will be organized by our children next Friday.
4. The lunch has been eaten by Tom.
5. Our classroom has been cleaned by us.
6. A new uniform has been bought by me this year.
7. The book has been forgotten by Ann this morning.
За правильность не ручаюсь. Но, кажется, нормально.