Are these pictures?
Yes, they are.
What's this?
It's a pencil sharpener.
What are these?
They are doors.
What's this?
It's a window.
Are these pencil sharpeners?
Yes, they are.
What are these?
They are clocks.
What are these?
They're paper clips.
Are these paper clips?
No, they aren't. (They're windows).
What's this?
It's a picture.
Is this a window?
No, it isn't. (It's a door.)
Is this a workbook?
Yes, it is.
What are these?
They are workbooks.
Is this a clock?
Yes, it is.
Is this a calendar?
No, it isn't.
What's this?
It's a calendar.
Are these doors?
No, they aren't. (They're calendars.)