第二部分阅读理解（共两节，满分40分）
第一节（共15小题：每小题2分，满分30分） 阅读下列短文，从每题所给的四个选项（A、B、C和D）中选出最佳选项，并在答题卡上将该项涂黑。
A
Sport is not only physically challenging, but it can also be mentally (精神上地) challenging. Criticism from coaches and other teammates, as well as pressure to win can create a great amount of stress for young athletes. Stress can be physical, psychological, and research has shown that it can lead to burnout. Burnout has been described as dropping of an activity that was at one time enjoyable.
