a.This craze start in America
b.This craze was started for Canadian ice hockey players.
c.The blades changed for wheels because the hot sun melted the rivers,and the lakes where the skaters used to practise.
d.The avatanges of roller-blading are that the skaters could exercise the same muscles on the road as they did on ice.
e.The roller-bladers can go 30 miles per hour.
f.The protective equipment consist of a helmet,knee and elbow pads and special wrist bands.
g.In-line roller-skates can use anyone who want to get somewhere fast.
