1. Nobody has ever treated me with such kindness.

   • I have never been treated with such kindness by anybody.

2. No one believes his story.

   • His story is not believed by anyone.

3. John used to visit my Cole at weekends.

   • My Cole used to be visited by John at weekends.

4. How many languages does she speak?

   • How many languages are spoken by her?

5. Has Tom finished the work?

   • Has the work been finished by Tom?

6. Did the teacher give some exercises?

   • Were some exercises given by the teacher?

7. Are you making inquiries about him?

   • Are inquiries being made about him by you?

8. Why didn’t they help him?

   • Why wasn’t he helped by them?

9. How many games has the team played?

   • How many games have been played by the team?

10. Where do people speak English?

    • Where is English spoken by people?

11. Who are they keeping in the kitchen?

    • Who is being kept in the kitchen by them?

12. How can they open this safe?

    • How can this safe be opened by them?

13. What books are people reading this year?

    • What books are being read by people this year?

14. How did the police find the lost man?

    • How was the lost man found by the police?

15. Who looked after the children for you?

    • Who were the children looked after by for you?

16. How long have they waited for the doctor?

    • How long has the doctor been waited for by them?

17. What time can the boys hand in their papers?

    • What time can the papers be handed in by the boys?

Now, let's convert the sentences with verbs of reporting to passive voice:

1. They think that he has died a natural death.

   • He is thought to have died a natural death.

2. Some people believe that 13 is an unlucky number.

   • 13 is believed to be an unlucky number.

3. They say that John is the brightest student in class.

   • John is said to be the brightest student in class.

4. They reported that the President had suffered a heart attack.

   • The President was reported to have suffered a heart attack.

5. I knew that they had told him of the meeting.

   • I knew that he had been told of the meeting.

6. They declared that she won the competition.

   • She was declared to have won the competition.

7. They rumored that the man was still living.

   • The man was rumored to be still living.

8. People think that Jack London's life and writings represent the American love of adventure.

   • Jack London's life and writings are thought to represent the American love of adventure