SinceWilliamhadbeenseriouslyillforseveralmonths,hisparentswereworriedabout________toreturntoschoolfull-time.
Sorrysir,wedon'thavewineorbeer.Weareonlylicensedtosell_______drinks.
Senior members of the staff competed eagerly ________ the position of sales manager in the company.
Since William had been seriously ill for several months, his parents were worried about________ to return to school full-time.
ShegotajobasanassistantstagemanagerattheCambridgeArtsFestivalTheatre,thinkingthatitmight________toacareerasaplaywright(剧作家).