An ambulance must have priority as it usually has to deal with some kind of ________.
句意: 救护车必须享有优先权, 因为它通常都要处理紧急情况。 emergency紧急情况; 突发事件。 crisis危机。 urgency紧急; 催促; 紧急的事。 emergence出现,浮现; 发生。