Multiple choice They usually work from 9:00 am __________________ 5:00 pm. to at from with Reveal answer Fill a bubble to check yourself A Correct answer Explanation The prepositional phrase 'from [time] to [time]' is used to express the start and end of a time range. Since 'from' is already used before 9:00 am, 'to' is the correct preposition to introduce 5:00 pm.