Atriathlon(三项全能运动)isasportseventwhichcombinesthreesports61(typical)runningbikingandswimming.Duringatriathlonathletesfinishallthreesportswithoutstopping62(beat)theclock.Peopleofallagesandsiz

Question

A triathlon(三项全能运动) is a sports event which combines three sports 　61　(typical)running biking and swimming. During a triathlon athletes finish all three sports without stopping　62　(beat) the clock. People of all ages and sizes can compete in triathlons. But much like other sports events a lot of professional　63　(compete) rule the triathlon world. In addition many triathlons　64　(hold) to benefit charity much like marathons.

The modern triathlon appeared in California in　65　1970s. It usually begins with the swimming 　66　(follow)by cycling and finally running. A triathlon tests the endurance(忍耐力) and speed of an athlete as well as his or her ability to keep energy and focus　67　the race as a whole. A triathlon competes against a clock rather than against other athletes. A variation of the triathlon is a relay triathlon 　68　a different athlete completes each stage.

The swimming stage takes place in a lake or the open ocean. As soon as athletes come out from the water they change into cycling at the　69　(fast) speed to save time. After cycling the athletes change shoes to run. The course is considered complete once the athletes　70　(cross)the finish line.

Answer 1

61．typically

62．to beat

63．competitors

64．are held

65．the

66．followed

67．on

68．where

69．fastest

70．have crossed