change passive voice

11. Her mother bought her a book yesterday. 

12. The waiter has just brought me this dish. 

13. Our friends sent us these postcards two days ago. 

14. Tim ordered this train ticket for his mother. 

15. Their grandmother told them that story when they visited her last week. 

16. You didn’t show me the special cameras. 

17. She showed her ticket to the airline agent. 

18. He has lent his friend his new shoes. 

19. She left her relatives five million pounds. 

20. The shop assistant handed these boxes to the customer.