When he came to life, he found himself ______ to a tree.
—Is the television advertisement working? —Yes. orders are coming.
The of surfing the Internet is how you can tell whether the information is true or not.
Gun control is a subject_____ Americans have argued for a long time.
Ladies and gentlemen, please remain_____ until the plane has come to a complete stop.
As is often said, a friend is to man_____ water is to fish.