On the/full/red alert
Meaning: on guard, to be expecting problems and ready to deal with them
Example: He’s cautious and always on the alert. Police in the region were on full alert against further attacks.
Выучи грамотный разговорный английский до уверенного владения всего за 9 месяцев по системе естественного усвоения иностранных языков. Жми!
Example: He’s cautious and always on the alert. Police in the region were on full alert against further attacks.