B．with the help of schools

　　C．in big cities of America

　　D．among famous sportsmen

　　A　[细节理解题。根据文章第一段"Since it started in a Paris suburb around 1995，free­running has attracted lots of fans in cities around the world."可知免费跑步在20年前的巴黎郊区开始流行。故A正确。]

　　2．Free­runners shouldn't ．

　　A．use their imaginations

　　B．start with the easy moves

　　C．jump on flowerbeds

　　D．run between buildings

　　C　[细节理解题。根据文章第四段"The sport's website has lots of rules，for example，don't break people's windows，don't jump on flowerbeds and don't be rude to people who want you to stop."可知不可在花坛运动。故C正确。]

　　3．According to the passage，free­running is an sport.

　　A．ancient　　　　　　 B．expensive

　　C．unexciting D．exciting

　　D　[细节理解题。根据文章内容可知A、B、C三个选项与原文的事实不相符合，只有D项符合。故D正确。]

　　4．The purpose of this passage is to ．

　　A．explain the importance of outdoor activities

　　B．introduce some information about free­running

　　C．warn children not to join in dangerous sports

　　D．advise people to do more exercise at home first

　　B　[推理判断题。根据文章内容可知，文章主要介绍了免费跑步的优点，故作者目的是向读者介绍一些免费跑步的信息，故B项正确。]