--Excuse me, can I have this seat, please?--I’m sorry, but it’s_______.
—______is this girl? —She is my sister. —______do you spell “sister”? —S-I-S-T-E-R.
—______your schoolbag? —It’s on the sofa.
—Are these books? —No, they aren’t. They are______.
This is new computer. It’s on table in my bedroom.
There are two windows ____ the wall and one picture __ the wall.