19. the meeting will be held before may day
20. the engine of the car have to be repaired
21. this room may be used for the classroom
22. a story is going to be told by the teacher
23. the cake is being cut with a sharp knife
24. my hat used to be pulled over my eyes by her
25. a nest has been built in the porch since last week
26. the murderer hasn't been found yet
27. this story isn't believed by anyone
