①规则是社会生活正常进行的保障,是自由的前提
②生活中,有规矩、懂规矩、守规矩十分重要
③社会成员都应该遵守共同的行为准则
④无规矩不成方圆
A:①②③④
B:①②③
C:①④
D:②③④
——Thousands of people come to visit Qinghai Lake every year. ——That's true. It has become our _______.