Измените предложения, построив на их основе пассивную конструкцию с предлогом by. 1. steven has read a lot of interesting books. 2. the young worker made a model of a ship. 3. john is visiting a hospital. 4. our class organized a meeting yesterday. 5. the spaceship discovered (открыл) a new planet. 6. our friend won the first prize. 7. john called his dog blackie. 8. he is using a computer in this project. 9. jack builds a small house in the woods. 10. steven has written a book.