________ invention the wheel is! — I can’t agree more. It is an invention that changed the world.

____________we had at Disneyland!

tective, _____ to be reading a newspaper,glanced at the man ______ next to a woman.

Don’t go to crowded places, _______ you may have the flu easily.

It took him a long time to _________ the skills he needed to become a professional artist.