Is it a pen ?
Yes, it is .
Is it a ruler ?
No, it isn't . It's a backpack .
What is it ?
It's a backpack .
What is it ?
It's a ruler .
Is it a pen ?
No, it isn't . It's a pencil .
What is it ?
It's a pen .
What is it ?
It's a pencil .
What is it ?
It's a pencil case .
Is it a pencil case ?
No, it isn't . It's an eraser .
Is it a pencil case ?
Yes, it is .
What is it ?
It's an eraser .
Is it a ruler ?
Yes, it is.