Joining the firm as a clerk, he got rapid promotion, and _____as a manager.

____ bykeepingdowncostswillPowerDataholditsadvantageoverothercompanies[ ]

Some pre-school children go to a day-care center, __________ they learn simple games and songs.

I think Mr Li is one of ______ in our school.—-Me too. He’s friendly and helpful.

If prices rise too high, the government has to dosomething __________ it.