21.America was discovered by Columbus .
22. The bus was stolen from outside school yesterday by somebody.
23. Bananas are grown in Africa by them.
24. The child is being chased by dog .
25. The product will be advertised on television by them .
26. Your health can be improved with more exercise by you .
27. Was "EAT" directed by Steven Spielberg.
28. The second hand car has been sold Ted by Bob.