.—Please ____ him find his bike.—OK.
I think basketball is interesting, ______ he thinks it is ______.
— 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.