---What can I do for you, sir?--- I want _______apple juice and _____apple.A./; an B. an; an C. a; a
_____ of the workers in this factory is about five hundred. ______ of them are women.
This picture is quite old, we can still see it was drawn in century.
—What can I do for you? —I’d like two _______.
Could you help me, Andy? We need ______ tables for the birthday party.
It took him ____ to find the key to the drawer.