Marcus is a handsome and athletic kid. He plays tennis and 1 the state tournament every year. Marcus's neighbor, Conrad, is also 2 to compete, but he has rheumatoid arthritis （类风湿性关节炎）. Although it pains him just to walk, he 3 painful days at school walking to the sports field. He loves watching his school compete so he doesn't 4 a game.
Marcus has known Conrad since primary school. They've always been 5 . He sees Conrad in pain and his 6 at not being able to play sports. So, every day after school, Marcus 7 his classmates to go to Conrad's for a moment of discussion about the game competition. The discussion is as 8 as a real high school game, which makes Conrad forget the hurt.
Finally, the doctors found a new 9 to reduce the pain. Conrad walks without much pain, and then begins running, but he still has to learn the 10 of running. After a childhood of walking carefully and taking 11 steps, Conrad has to train his walking like a kid again and stay in shape. He pushes himself every day, building his lungs and doing leg lifts repeatedly for his leg 12 . He knows what pain feels like, but running for Conrad is no longer 13 .
To Conrad's delight, he gets a chance to join the cross country team. Conrad doesn't win, not once, but Marcus is there, 14 for him who always finishes in the middle of the competitors, breathing in wind and waving his hands 15 .
