What / Who is this?
Who is this? This is a girl.
What / Who is this?
Who's this? This is a nurse.
What / Who is this?
What is this? This is a book.
What / Who is this?
Who is this? This is a farmer.
What / Who is this?
Who is this? This is a boy.
What / Who is this?
What is this? This is a ruler.
What / Who is this?
What is this? This is a computer.
What / Who is this?
What's this? This is a ball.
What / Who is this?
What is this? This is an eraser.
What / Who is this?
Who is this? This is a teacher.