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Change these sentences into the passive voice. 14. The children usually buy the tickets at the box office. .................................................................................................. 15. They have finished their homework. .................................................................................................. 16. The teacher will correct our exercises tomorrow. ................................................................................................ 17. Have they watched this show? .............................................................. 18. Mrs Allen didn’t write that novel in 1998. .............................................................................. 19. He left the letter on the desk some minutes ago. .......................................................................................... 20. We will feed the chickens later. ................................................................. 21. Mary is typing the report in the office. ....................................................................... 22. Will your father help you? ...................................................... 23. Someone has broken the window. .................................................................. 24. You shouldn’t wash this shirt with detergent. ..................................................................................... 25. We are taking the test next week. ...................................................................