Lance Armstrong is thirty-three years old and is one of the best athletes in

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问题    Lance Armstrong is thirty-three years old and is one of the best athletes in the world. Scientists say his body operates better than the【S1】______person. For example, his heart can【S2】______more than two hundred times a minute. It pumps an extremely large amount of blood and oxygen to his legs.
Edward Coyle, head of the Human Performance Laboratory at the University of Texas in Aus tin, tested Armstrong five times from 1992 until 1995. Each time, the cyclist rode a【S3】______bike for twenty-five minutes with the work rate increasing every five minutes.
Scientists measured Armstrong’ s【S4】______against the amount of oxygen he breathed. Doctor Coyle discovered an 8% increase in Armstrong’s muscle power. Doctor Coyle【S5】______Armstrong might have developed more of a certain kind of muscle during his seven years of training.
Doctor Coyle also discovered that Armstrong was able to reduce his body weight and body fat before his Tour de France victories. This enabled him to increase his power in relation to his body weight by 18%. Doctor Coyle says the results of the【S6】______show that long-term training has more of an effect on athletes than scientists thought.
Lance Armstrong is【S7】______in another way. In 1996, when he was twenty-five, he discovered he had cancer of the testicles(睾丸), which had spread to his lungs and brain. Armstrong received chemical【S8】______and several operations on his brain. After he【S9】______, he began training a gain in 1998. The next year he won his first Tour de France race. Many people who have【S10】______and are living with cancer believe he is a hero.

A)bite                                        I)performance
B)study                                     J)recovered
C)average                                     K)fixed
D)suspected                                  L)departed
E)exercise                                  M)frequent
F)beat                                        N)treatment
G)unique                                     O)breakthrough
H)survived [br] 【S3】

选项

答案 K

解析根据结构分析可判断此处需要填入一个形容词或者相当于形容词功能的词(动词的现在或过去分词等)。来修饰bike，选择范围缩小到D，G，H，J，K，L，M，尝试着把这些单词放入空白处，根据上下文判断这里是指骑某一辆固定的自行车，故答案为K。

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