Is this a backpack?
Yes, it is.
Is this a pair of scissors?
Yes, it is.
Are these books?
Yes, they are.
Is this a pair of scissors?
No, it isn't.
Are these pencil sharpeners?
Yes, they are.
Are these erasers?
Yes, they are.
Is this an eraser?
Yes, it is.
Is this a notebook?
Yes, it is.
Is this a pen?
Yes, it is.
Is this a pen?
No, it isn't.
Are these glue sticks?
Yes, they are.
Is this a mechanical pencil?
Yes, it is.
Is it a pencil case?
No, it isn't.
Is this a pencil sharpener?
No, it isn't.
Is this a pencil case?
No, it isn't.
Are these books?
No, they aren't.