Multiple choice general knowledge Our secretary will arrive here ---------- 6 P.M at before on about Reveal answer Fill a bubble to check yourself B Correct answer Explanation The sentence indicates the secretary will arrive sometime prior to 6 P.M. 'Before' is the logical choice for this context. 'At' would specify the exact time, 'on' is used with days, and 'about' would give an approximation rather than a deadline.