Don't copy others' work. If you do it by , you'll feel much better.
A set of keys ____ in the library. Are they yours?
— Where _______your books? — _______ in the bookcase
— Does David have a ping-pong ball?—________. But he has some tennis balls.
Hi,Linda. This _____ my sister and those ______ my brothers.
_____ your brother_____ baseball?