高中必刷题高二下学期英语北师大版选修七 Unit 21 Human Biology 单元限时作业课件

英语 高二下 BS 历史 必修3 RJ Unit 21 Human Biology 选修7 单元限时作业 03 Michelle Kwan is a champion ice skater who has won five World Championships, nine US Championships and two Olympic medals, in addition to countless other skating competitions.While audiences have seen her glide effortlessly across the ice, long hours of practice and devotion contribute to each jump and spin. Kwan began ice skating when she was five years old, and her skill quickly became evident.At the age of eight, she skated several hours a day, every day of the week.Before school, after school and on weekends, she was at the ice rink.The cost of ice time and coaches quickly grew, but her parents were committed to her success.Her family sold their home and purchased a much smaller one to free up money to pay for her ice skating. When Kwan was 13, she performed at her first US National Championships.After a disappointing performance, she swore to work even harder and improve.She did.The next year, she finished second.From the