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3.Are?these?your?books? Yes,?they?are?./
No,?they?aren’t?. They?are?hers.
a pencil
a pen
a book
a schoolbag
a dictionary
What’s this?
an eraser
It’s a pencil.
an eraser
a ruler
a pencil box
What’s that?
It’s an eraser.
pencils
schoolbags
dictionaries
What are these?
pencil boxes
They are pencils.
erasers
rulers
pencil boxes
What are those?
They’re erasers.
What’s this/that? It’s a/ an …
What’re these/ those? They are …
Is this/that a ruler?
？