【答案解析】[解析] [听力原文]

Before laws were written, there was no sure way/of knowing what Was permitted and what Was for- bidden．/One judge might apply one set of rules to a case/while another judge might apply completely different rules to a similar case．/It all depended on the personal judgment of one person．/
Today we follow the custom of recording our laws．/Rules passed by our lawmakers are printed and available for everyone to see．/Unless laws are publicly available．|we do not regard them as binding．/
Each of US is subject to many different sets of laws. /Some laws say what is permitted, such as how fast you may drive. /Other laws say what is required, such as paying a federal income tax．/Still other laws say what is prohibited, such as smoking in elevators．/In the United States, federal laws apply to everyone/and state laws apply to activities within each state./
[听音关键] 本文介绍了法律的形成及法律的功用，关键词有：Before laws were written...personal judgment；To- day...laws；different sets of laws...Some...permitted...Other...required...Still other...prohibited； US...federal laws...state laws。
[听写难点] ①动词的过去分词形式，如要双写辅音加-ed的词在文中有多个：written，permitted，forbidden；②难词， 如：completely完全地，available可利用的，binding有约束力的，prohibited禁止，elevators电梯。
[画龙点睛] 听第一遍时要善于抓住文中表示结构层次的词来进行理解。第二、三遍书写时可以利用一些符号或数字来 代替，如permitted可以写成√，forbidden可以写成×，one写成1。第四遍时进行查漏补缺。最后两分钟修 改的时候补充完整简写和符号等。