252.A graduated license requires that a teenager first prove himself capable of driving in the presence of an adult, followed by a period of driving with night or passenger restrictions, before graduating to full driving privileges.
本句的主干是license requires that。that引导的是requires的宾语从句，in the presence of an adult为状语，followed by a period of driving with night or passenger restriction和before graduating to full driving privileges皆为时间状语。
capable of doing sth.的意思是“有能力做某事”，也可直接用做capable of sth.。如:
She is capable of better work than this.她有能力把工作做得更好。
in the presence of sb.的意思是“在……面前，有……在场”，也可用作in sb.'s presence。如:
You never seem at ease in my presence.你在我面前总是显得不自在。
She finally graduated to having a role in a movie.她终于能在电影里扮演角色了。