Нужна помощь по английскому!! Перифразируйте предложения, используя Passive Voice, не указывая при этом исполнителя

Перифразируйте предложения, используя Passive Voice, не указывая при этом исполнителя действия.

1. We gave our friend many interesting books for his library. 2. I will return the book to the library in time. 3. The teacher is explaining new material to us. 4. They sent a telegramme to him yesterday. They congratulated him with a gold medal. 5. His doctor has advised him to take up swimming. 6. The captain of the team offered her to take part in the competition. 7. We have just finished our work. 8. He has already solved his problem. 9. The guide proposed us to see the Cathedral. 10. The examiner didn't give us enough time to answer all the questions. 11. The teacher allowed Ann to be absent from her English class on Monday. 12. We listened to the speaker very attentively. 13. The students will discuss the report next week. 14. The workers will build a new school next year. 15. Someone wants you on the phone. 16. Mr. Brown moved out all the small furniture into another room. 17. The secretary didn't tell me the exact time of the appointment.