38. When did you mother make this cake?
A. When is this cake made?
B. When was this cake made by your mother?
C. When did this cake be made?
D. When were this cake made?

39. If you can’t drive, who is going to drive your car?
A. If you can’t drive, who is going to be driven your car?
B. If you can’t drive, by whom is your car going to be driven?
C. If you can’t drive, whom is your car going to be driven?
D. If you can’t drive, who your car is going to drive?

40. They have painted the walls green.
A. The walls has painted green.
B. The green has been painted walls
C. The walls have been painted green
D. The walls have painted to green