Mr. Smith spoke slowly and clearly to make himself ______.
— Let’s play _____ football.—That _____ good.
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.