29. Mistakes have not been made by anybody.
30. My question has not been answered properly by anybody.
31. This child has been brought up badly by somebody.
32. Jane was promised a prize by the teacher if she worked well.
33. I have never been spoken to like that before by anybody.
34. Lessons should be made more interesting for school children by teachers.

29/  Mistakes have not been made by anybody.
30/  My question has not been answered properly by anybody.
31/  This child has been brought up badly by somebody.
32/  Jane was promised a prize by the teacher if she worked well.
33/  I have never been spoken to like that before by anybody.
34/ Lessons should be made more interesting for school children by teachers.