The air is badly ________.And there’s more water _______ in the world.

____ today， he would get there by Sunday.

He is ______ is known as a hacker —- he likes to show off on the Internet and attack websites

We live in a society ______ there is a great deal of debate about competition.

Though computers can do a lot of work man can’t do, they can’t completely________human beings. [ ]