[解析]
(1)A.细节理解题。根据第一段"When I was 6,my elder brother brought me to the local BMX (自行车越野) track to ride in a kid's race for the first time.The hill out of the starting gate looked so scary and step that I backed off.(我6岁的时候,哥哥带我来到当地的自行车越野赛道,第一次参加了一场儿童比赛。起跑门外面的山看起来又吓人又陡峭,我只好退出了。)"可知,作者退出了她的第一次小轮车比赛。故选A。
(2)D.细节理解题。根据第四段" Strength and balance are key in competition,so I work out at least five days a week to prepare.I do tons of resistance and agility (灵活) training,both on and off the bike.Strength and balance are key in competition,so I work out at least five days a week to prepare.I do tons ofresistance and agility (灵活) training,both on and off the bike. (力量和平衡是比赛的关键,所以我每周至少锻炼五天来做准备。我做了大量的阻力和敏捷性训练,不管是在车上还是在车下。)"可知,为了赢得自行车越野比赛,作者必须保持平衡。故选D。
(3)B.词义猜测题。结合画线处前后文"I need to concentrate on winning so my competitors can't capitalize on an error and pass me!(我需要集中精力赢球,这样我的竞争对手就不能利用一个错误而超越我!)"可知,该句的意思是如果她在球场上犯了错误,她必须继续前进,需要集中精力去赢得比赛,这样竞争对手就不能利用一个错误而超越她,对手是利用竞争对方的错误从而超过对方。A.make up for弥补;B.take advantage of利用;C.keep an eye on密切关注;D.take notice of注意。故选B。
(4)B.推理判断题。根据最后一段"I'm continually working to reach my potential in the sport.Until I feel completely satisfied,I'll keep coming back.(我一 直在努力发挥我在这项运动中的潜力。直到我感到完全满意,我将继续努力。)"以及倒数第二段" Strength and balance are key in competition,so I work out at least five days a week to prepare.I do tons of resistance and agility (灵活) training,both on and off the bike.I also do mental drills with a sports psychologist to make sure I'm focused and confident going into competition.I need to concentrate on winning so my competitors can't capitalize on an error and pass me!(力量和平衡是比赛的关键,所以我每周至少锻炼五天来做准备。我做了大量的阻力和敏捷性训练,不管是在车上还是在车上。我还会和一位运动心理学家一起做心理训练,以确保我在参加比赛时注意力集中、信心十足。我需要集中精力赢得比赛,这样我的对手就不会利用一个错误超越我!)"可推断,是因为雄心勃勃、勤奋的品质使得作者获得成功。A.Proud and serious.骄傲而认真的;B.Ambitious and hard﹣working.雄心勃勃,努力工作的;C.Optimistic and generous.乐观大方的;D.Independent and cooperative.独立合作的。故选B。