跨栏远动员刘翔在奥运周期的前一年参加了二十多场重大比赛，为了适应

答案：D

正确答案：
In the 2008 Beijing Olympic Games Chinese athlete Liu Xiang dropped out of the race due to his foot injury，which led to a heated discussion among people across the country．
According to a survey conducted by Sina Website，over 34％of the people think an athlete should quit the race when injured since health is much more important than a gold medal；while near1y 20％of the netizens believe that an injured athlete should hold on to the end instead of giving up halfway．They regard the sports field as a battlefield in which every athlete should fight for the honor of his or her country in spite of any difficulty．
In my opinion，it was a right choice for Liu Xiang to choose to quit the race．For one thing，nothing is more important than health and sports don’t mean sacrificing one’S health for a gold medal；for another，after Liu Xiang recovers fully，he still has many chances to realize his dream．

正确答案：C
推论变形题。题干说到，黑人运动员已经在这个项目上垄断了很多年了，可见，C项符合这个意思，也就是题干不构成对C项的反驳，因此，C项正确。A、B、D项与题干的意思均不一致，题干构成了对它们的反驳。

参考答案：B