Multiple choice general knowledge Unfortunately, I might have to leave for Boston _____. to short notice under short notice at short notice for short notice Reveal answer Fill a bubble to check yourself C Correct answer Explanation 'At short notice' is the correct idiom, meaning 'with little warning' or 'suddenly.' The phrase describes having to leave quickly without much preparation time. 'To,' 'under,' and 'for' are not the correct prepositions for this expression.