If you leave the club, you will not be ________back in.
Never ______ so excited because it is the first time that I ______ such a fantastic experience.
Mary is ______ a translation of a French novel.
Plastic parts can ______ metal ones in many machines. But they don't last long.
—I’m thinking of the test tomorrow. I’m afraid I can’t pass this time.—________!I’m sure you’ll make it.
-- Mr. Brown, National Day is coming…--- ______? Just occupy yourself in your study.