25. They were washing their car when I came.
=> Their car was being washed when I came.
26. She is cleaning the floor now.
=> The floor is being cleaned now.
27. We have just finished our homework.
=>Our homework has just been finished.
28. Noone can solve this problem.
=> This problem can not be sloved.
29. They sell jeans all over the world.
=> Jeans are sold all over the world.
30. My mother gave me a new skirt.
=> A new skirt was given me by my mother.