1.Is this your pencil?
2.Is this his green pen?
3.Is that your schoolbag?
4.Are these your book?
5.Are these her keys?
1.Yes, it is.It′s mine.No, it isn′t, it′s hers.
2.Yes, it is.No, it isn′t the blue pen is his.
3.Yes, it is.No, it isn′t, is his.
4.yes, they are.No, they aren't.They are mine