The dog, later 41 _(name) Arthur, came up to a Swedish team while the members were sharing a meal in front of a 20_mile race stage through the rough area in Ecuador. One of the__42__(athlete), Mikael Lindnord, took pity on the dog wandering near their table and fed____43___meatball to it. And that meatball made them friends for life, as far as Arthur was concerned.
The extreme sport of adventure racing includes biking, hiking, and boating that challenge even the___44__(strong) humans. Imagine a dirty stray（迷失的）dog trying __45___(keep ) up. But Arthur___46__(do
) keep up. The dog followed the team as they got up to leave.___47___(actual), he never stopped following them---swimming alongside the boat of the team, and taking on muddy(泥泞的)slopes when the team hiked.
Arthur stayed alongside the team for the rest of the___48___(compete),but not without cost to his well—being. The dog needed doctor’s attention after the six-day race was finished__49__the team helped Arthur as much as they could during the event. Arthur’s hard work paid off: Lindnord decided to adopt(收养) the dog __50__brought him back to Sweden.