We all know that some things are obviously right. For example, it is right to be 1 to other people. It is also right to look after the environment. Some things are 2 wrong, too. For instance, we should not hurt or bully(欺负) others, nor should we litter. Rules often tell us what is right or wrong..
Rules can help the public make the right 3 ,and remain safe. Car drivers have to obey traffic regulations that tell them the right things to do on the road to avoid crashes. Cyclists who give signals before turning or stopping help prevent 4 .
