The CDs are on sale!Buy one and you get ______ completely free.
The classroom is almost empty, where is _____?
Don’t go to _____ places where there is no fresh air.
Energy is ____ makes one work.
I know nothing about the accident except _____ I read in the paper.
—I’ve got an “A” in the examination. —That’s a good ______. You will surely win a second.