Правильно выбрать is this / these your exercise-book ? no, it isn't . thas is /these are my exercise -book. it is green . this is / these are my scissors , and thas is / those are her pictures . this / these aren't your pensils. they are my pencils . are this / these your cassettes ? no. those / that are my cassettes in that / those bag.
This is
These are
Those are
Are these
Those are
That