一What's behind door? I can't open it. 一Let me see.Oh,there's a chair.
I saw a street cleaner __________ the street when I went to school this morning.
Planes are _________ than trains and buses.
My father drives sick people to the hospital, because he is a/ an _______.
My new classmate, John is a boy from ____.
Put the sofa ______ the TV set, then we can watch TV comfortably in it.