31. Money is collected by John
32. The window is opened by Anna
33. Our homework is done by us
34. A question is asked by me
35. The picture is cut out by him
36. A lot of grass are eaten by the sheep
37. Our rooms aren't cleaned by us
38. The car isn't repaired by Wiliam
39. Is this circle drawn by Sue?
40. Is the dog fed by you?