Перефразируйте следующие предложения из активного в страдательный залог.
Ex: The director sent for the secretary. The secretary was sent for.
1. The teacher asks the students a lot of questions.
2. She visited her friends.
3. They will show us a new film tomorrow.
4. We discussed an interesting problem at the lecture.
5. The parents told the boy to be back at home at 9 o’clock.
6. Columbus discovered America.
7. The professor usually examines the students in the room 502.