Is is a calculator?
Yes, it is.
Are they erasers?
No, they aren't. They're books.
Is it a backpack?
Yes, it is.
How many students are there?
twelve students
Can he draw?
Yes, he can.
Can she play basketball?
Yes, she can.
Are they scissors?
Yes, they are.
Is it a ruler?
No, it isn't. It's a snake.
Can the dog swim?
Yes, it can.
What can she do?
She can sing.
Is it a rubber/eraser?
Yes, it is.