Multiple choice Directions: Fill in the blank with the correct option. Do not go _____ I come. till if unless before since Reveal answer Fill a bubble to check yourself D Correct answer Explanation This is a conditional sentence where an action is bound to take place only after the occurence of the other. Preposition 'until' and 'before' both fit to the situation. In absence of 'until', 'before' is the correct usage.