( fire drills)
When there is a fire drill in a particular building, the people who work or live there practise what to do if there is a fire.
N-VAR
( fire drills)
When there is a fire drill in a particular building, the people who work or live there practise what to do if there is a fire.
N-VAR
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006