[解析]
(1)C.细节理解题,根据That changed because of a man named Joseph Merlin.可以知道人们喜欢滑旱冰是由于Joseph Merlin方面发明了旱冰鞋,故选C.
(2)B.细节理解题,根据Merlin was a man with many ideas and many dreams.People called him a dreamer.可以知道Merlin是一个有许多想法的人,故选B.
(3)D.细节理解题,细节题.根据文章第二段He wanted to find a way to make a wonderful entrance at the party可以得知他发明旱冰鞋的契机是为了在一场重要派对上博人眼球.故选D.
(4)A.细节理解题,根据There was just one problem.Merlin had no way to stop his roller skating,可以知道没有方法能使Merlin停止滑旱冰,故选A.
(5)B 主旨大意题.根据Today,roller skating is easy and fun.But many years ago,it wasn't easy at all.Before 1750,people never tried skating on wheels可知文章主要讲述旱冰鞋被发明的来源,所以选择B