That is a book. Is that a book?Yes,that is.No that isn't.That is not a book

2.It is a white cat.Is it a white cat?Yes,it is.No it isn;t.It is not a white cat.
3.I go to school on foot.Do you go to school on foot? Yes,I do.No,I don;t.I don't go to school on foot.
4.He goes to school on foot. Does he go to school on foot? Yes,he does.No,he doesn't.He doesn't  go to school on foot.
5.We go to school on  foot. Do you go to school on foot? Yes,we do.No,we don;t.We don't go to school on foot.