Although there were only five athletes in the race, it was a rather exciting one.A. compe

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(答案→)A. peting
B. having been peted
C. to pete
D. to be peted
解析：考察非谓语动词，现在分词表示正在进行的动作，伴随主语进行的动作。不定式则表示还为发生，具体的动作。根据题意五个运动员是比赛逻辑主语，不用被动语态，选A，尽管比赛中只有五个运动员参加比赛，但它仍是很激动人心的一个。