Помогите правильно выбрать Is this / these your exercise-book? No, it isn't . Thas is /These are my exercise -book. It is…

Помогите 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.