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Help the frantic wizard give instructions to his apprentice by choosing the best time conjunctions.
"Do not stop stirring the potion _________________________ it turns bright purple! And please, hide all the garlic _________________________ Count Dracula arrives for dinner."
The correct answers are until and before.
Use until to describe an action that continues up to a certain point in time ("do not stop... until").
Use before to describe an action that must happen prior to another event (hiding the garlic must happen prior to the vampire's arrival!).