16. Mark reads the book. It is (hers, his, mine)
17. I have a bag. This is V. (ours, mine, yours),
18. Our neighbors have new pets. Those are (hers, his, theirs)
19. Luisa gets a stick. That is __.(theirs, his, hers)
20. We bought school'supplies. These are (ours, theirs,mine)​