We tried to find a table for seven, but they were all _______.

(2013·济南市一模)—I will have to think about it again.—If you ________， you may lose the opportunity to compete altogether.

It's bad         for a man to smoke in the public places where smoking is not allowed.

My mother opened the drawer to _________ the knives and spoons.

(2013·石家庄高三一模)Overuse of computers will ________ to the failure of our      eyesight, which is a warning to us all.