According to the passage, it is true that ________.
[A] in the late 19th century in the United States the piding line between adolescence and adulthood no longer existed
[B] no one can marry without the permission of his parents until the age of twenty-one
[C] one is considered to have reached adulthood when he has a driver’s license
[D] one is not free from the restrictions of child labor laws until he can join the arm
正确答案：A
45答案[A]意为：获得驾照的人就可以算是成人了第一段末句指出到了19世纪晚期美国的青春期和成年期的分界线消失Frontier意为dividingline所以[A]为正确选项
第二段倒数第五句指出18岁后可以不经父母的同意结婚所以[B]错在“21岁”第二段四六七句说明：16岁青少年可以获得驾照但只有到了21岁他们才称为法律意义上的成年人所以[C]错误第二段倒数第六七句说明：16岁就可以不受童工法限制而18岁后他们才可以参军所以[D]错误
