–Look! A man is cutting a tree on the moon.--It ______ be true. The teacher said there is no air on the moon.
—Here ______ some books ______ you, Jim. —Thanks very much.
--- What’s your favourite day? --- ______.
______ are my pencils. ______ pencils are in the schoolbag.
—Is this ______ model plane? —No, it isn’t ______.
This is ______ art book. ______ book is Alan’s.