Whose pencil is it? It (this) is my sister's pencil.
Is it (this) your copybook? Yes, it is.
Is it (this) a notebook of your brother? No, it is my notebook.
Where is your desk? It is in the middle of the room.
Where is your pen? It's in my pocket.
Where's your book? It is on the table.
Where is your mom? She's at work.
Where is your brother? He's at school
Where is your sister? She's at home
Whose pencil is it? - It is my pencil. - Where's my pencil? - It's on the
table.