Change the sentences from active to passive. Add the agent if necessary. Model: Someone might cancel the lesson. — The lesson might be cancelled. 1. Someone might cancel the lesson. 2. A doctor can prescribe some medicine. 3. People should plant tomatoes in spring. 4. Mr. Hook must send this letter. 5. Someone may build a new post office on First Street. 6. People should read books. 7. People can reach me at the following telephone number: 555- 3815. 8. People should place stamps in the upper right-hand corner of an envelope. 9. Someone must paint that fence. 10. People cannot control the weather. 11. Someone had to fix our car before we left for Chicago. 12. All of the students must do the task.​

1. The lesson might be canceled by someone.2. Some medicine can be prescribed by a doctor.3. Tomatoes should be planted in spring by people.4. This letter must be sent by Mr. Hook.5. A new post office may be built on First Street by someone.6. Books should be read by people.7. I can be reached at the following telephone number: 555-3815.8. Stamps should be placed in the upper right-hand corner of an envelope by people.9. That fence must be painted by someone.10. The weather cannot be controlled by people.11. Our car had to be fixed before we left for Chicago by someone.12. The task must be done by all of the students.