Use the Passive Voice in the following sentences according to the

Use the Passive Voice in the following sentences according to the model.
M O D E L: They looked at the picture with admiration. The picture was looked at with admiration.
1. They listened to his lectures with great interest. 2. He throws away all his old note-books at the end of the school year. 3. You must think the matter over. 4. They spoke to the Dean on the subject. 5. We must send for the doctor immediately. 6. People talk much about this film. 7. People always laughed at his jokes. 8. They argued about the incident for a long time. 9. We cant speak of such important matters lightly. 10. She likes when people talk about her.