I want to buy ________ shoes.
A．a pair ofB．pair ofC．two pair of
I'm going to ________ a science teacher one day.
A．doB．beC．is
Amy ________ going to read books.
A．isn't B．aren't C．am not
—Are you going to use any books?
—________
A．Yes，you are.B．Yes，I am. C．Yes，I am going.
Where are you going ________ this afternoon?
A．onB．inC．/