Use the verbs in the Passive Voice:
1. They have decorated a huge New-Year tree in the centre of the square. 2. We had taken out our luggage before the car arrived. 3. What music are they playing? 4. They are speaking on educational problems. 5. I hope that he will have received my letter by Saturday. 6. I have cooked the dinner and laid the table. 7. They were singing folk songs. 8. Don't worry, we'll look after your children. 9. I have made a few New Year's resolutions (принять решение). 10. Nobody has lived in this house for a long time. 11. She opened the door and let him in.