校园安全是当前校园里一个比较突出,频发的问题。它涉及的范围也是相当广泛,包括食品安全,财产安全,交通安全,活动安全,防火,用电安全等等。请根据句中汉语提示,完成下列安全方面的建议和要求。
Students shouldn’t ____________________(去游泳)without adults.
We had better _______________________(关门窗)When we leave the classroom .
Students shouldn’t ____________________(被允许) use electricity in the dormitory(宿舍).
Don't _______________________(横穿马路)until the lights turn green.
_______________________________________________________________(自己写一条)