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【知识要点1】--How long did you skate？--I skated for two hours．【要点分析】how long的意思是“多久；多长时间”，用来对时间的长短进行提问。【中考链接】—___have you learned to play the guitar？ --For three years．（2008吉林长春）A．Howlong B．How often C．How soon D．How much