A.about twenty years ago | B.with the help of schools |
C.in big cities of America | D.among famous sportsmen |
A.use their imaginations | B.start with the easy moves |
C.jump on flowerbeds | D.run between buildings |
A.ancient | B.expensive |
C.safe | D.exciting |
A.explain the importance of outdoor activities |
B.introduce some information about free-running |
C.warn children not to join in dangerous sports |
D.advise people to do more exercise at home first |