Although exact figures on how many extreme athletes exist are hard to come by, isolated statistical evidence __58__ a rapid increase. For example, the number of climbers __59__ to climb Alaska’s 20,300-foot Mt. McKinley ---the tallest peak in North America---increased from 695 in 1984 to 1100 in 1997.
“It’s a numbers deal, and clearly there are more people getting hurt than there were when I started doing__60__ 20 years ago,” says Dan Burnett, a mission coordinator with the all-volunteer Summit County Search and Rescue Group in Colorado. “We’re responding in areas now that even four years ago I would have thought we didn’t need to check because __61__goes there.”
Some efforts have been made toward creating a(n) __62__ extreme-sports world. Three years ago, Denali National Park in Alaska, __63__, instituted a mandatory $ 150 fee for climbers seeking to ascend Mt. McKinley. The fee pays for an educational program that park rangers credit with dramatically __64__ the number of search-and-rescue missions and fatalities.
50. A. decision B. surprise C. devotion D. mission
51. A. launched B. held C. canceled D. posted
52. A. restarted B. restrained C. related D. recorded
53. A. progress B. money C. preparations D. limits
54. A. on duty B. on sale C. on film D. on average
55. A. apparent B. strange C. astonishing D. ultimate
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