Change the following sentences into Passive where possible. Помогите пожалуйста решить

1. Has anybody sent for Dr. Smith? - Has Dr. Smith been sent for?
2. She likes her hair long. -
3. Walter didn't give us any explanation of his strange conduct. We were not given any explanations by Walter about his strange conduct.
4. They gave us no choice. - We were given no choice.
5. Nobody promised me anything.- I wasn't promissed anything
6. Ray always expresses himself very clearly. -
7. Dr. Ross is performing an operation. - An operation is being performed by Dr. Ross.
8. Many people attended the concert. - The concert was attended by many people.
9. Miss Robinson dictated the words to us. - The words were dictated to us by Miss Robinson/ We were dictated the words by Miss Robinson..
10. The nurse told her nothing. - She was told nothing by the nurse.
11. Nobody commented on the statement. - The statement was commented on by nobody.
12. He became a pilot. -
13. Nobody tells us anything. - We are told nothing.
14. They served coffee in the dining-room. - Coffee was served in the dining-room.
15. Everyone had a lovely time at the party. -
16. The Egyptians played a game like checkers in 1600 B.C. - A game like checkers was played by the Egyptians in 1600 B.C.
17. Dad caught the largest fish. - The largest fish was caught by Dad.
18. Susan tamed the bird. - The bird was tamed by Susan.
19. The boat stopped for repairs. -
20. Our department manager hired two part-timers. - Two part-timers were hired by our department manager.

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11. The statement wasn't commented on.