Those who climb-|||-mountains are free to use their own methods.-|||-If we compare mountaineering with other more familiar sports,we might think-|||-that one big difference is that mountaineering is not a team game.We may be-|||-mistaken in this.There are,it is true,no matches between teams of climbers,-|||-but when climbers are on a rock face linked by a rope on which their lives may-|||-depend,there is obvious tea mwork.-|||-The mountain climber knows that he may have to fight forces that are stronger and-|||-more powerful than man.He has to fight the forces of nature.His sport requires-|||-high mental and physical qualities.-|||-A mountain climber continues to improve in skill year after year.A skier is probably-|||-past his best by the age of 30,and most international tennis champions are in their-|||-early 20s.But it is not unusual for men of 50 or 60 to climb the highest mountains in-|||-the Alps.They may take more time than younger men,but they probably climb with-|||-more skills and less waste of efforts,and they certainly experience equa enjoyment.-|||-6 Why do people look at mountaineers with astonis-|||-A.Mountaineering involves too much risk.-|||-B.Mountaineering requires too many skills.-|||-C.Mountaineering is a very demanding activity.-|||-D.Mountaineering is different from other activities-|||-7 What does the difference between a sport and a game lie in?-|||-A.Rules. B.Difficulty.-|||-C.Teamwork D.Participants.-|||-8 Why can mountaineering be called a team sport?-|||-A.Because teams of climbers play a match sometimes-|||-B.Because teams of climbers fight the forces of nature.-|||-C.Because there are a certain number of climbers in each team.-|||-D.Because mountaineers depend on each other while climbing.-|||-9 Compared with young climbers,what may NOT happen to climbers of 50 or 60-|||-when they climb mountains?-|||-A.They may spend much more time than younger climbers.-|||-B.They may possess more skills at climbing than young climbers.-|||-C.They may put in a greater deal of effort than younger climbers.-|||-D.They may experience the same enjoyment as younger climbers.-|||-10 What is the best title of the passage?-|||-A.Mountaineering-|||-B.Mountain climbers-|||-C.Mountaineering is different from golf and football-|||-D.Mountaineering is more attractive than other sports