You cannot take back your words _________ they are out of your mouth

Are you clear about the job of a policeman, Ben—Yes, to keep people ________ and the society in good order.

n tomorrow, we would have to call off the hike.

下列各句中，加点的成语使用恰当的一项是（ ）

Someone _____the tap on, for the water was running over and flooding the bathroom. [ ]