Is this/these your exercise book? no,it isn't.that is/these are my exercise book.it is green. this is/these are my pens,that is/those are her pens. this/these aren't your pencils.they are my pencils. are this /these your cds? no.those/that are my cds in that/those bag.
2. That is
3. These are
4. those are
5. This
6. Those
7. that