【導(dǎo)讀】homework?ideatobuildtheramp?skateboarding.FunOnWheels.petition?safely.theymean?traditionalsports?‘meansto‘skateboard’.isthe‘X-factor’?skateboardersuse?extremesports?enthusiastic,brave,,experienced,cautious,delighted,energetic,skilful,friendly,interested,athletic,outgoing,powerful,3.skillfula.tonight.grateful.hotday.