Tom, clean up the broken glass _________ someone walks on it.
Each time, Billy Crystal performs his stand-up routine in front of millions of people when the show is broadcast _______ on TV.
I rushed for the door , fell _______ the cat in the hallway and a tooth fell ________.
I expected him to go abroad, and ________, he did.
As China ________ into a market economy, the government no longer assigned jobs, food or free housing to urban residents.
Watching TV all evening or playing video games wasn’t exactly what he ______ mind for the National Day.