3．Many coaches and parents are in the habit of criticizing young athletes ________.

　　A．believing that criticism is beneficial to their early development

　　B．without realizing criticism may destroy their selfconfidence

　　C．in order to make them remember life's lessons

　　D．so as to put more pressure on them

　　解析：选B　推理判断题。根据文章最后一段可以看出，教练和家长的注意力主要在结果上，希望运动员能赢得比赛，但是显然没有意识到批评可能使年轻的运动员对其从事的运动热情尽失，再也提不起兴趣。

　　4．The author's purpose in writing the passage is to ________.

　　A．teach young athletes how to avoid burnout

　　B．persuade young children not to worry about criticism

　　C．stress the importance of positive support to children

　　D．discuss the skill of combining criticism with encouragement

　　解析：选C　写作目的题。本文主要论述的是教练和家长对运动员的影响，指出批评可能会使孩子丧失兴趣，应当多给运动员积极的评价，由此不难看出，本文的目的是强调正面鼓励的重要性。

　　B

　　"No matter how hard you train, if you don't sleep enough, you will lose." My brother, who just won the South German bodybuilding championship last Sunday, told me. Like food and exercise, sleep is a major pillar (支柱) of your health.

　　In almost anything you can think of - weight loss, building muscle, learning something new, preparing for a test or a speech, flying a plane - the person who sleeps enough will perform at their highest levels and get the best results.

　　In today's world, balancing your work life and your health is harder than ever. "Five hours of sleep is enough for me." I often hear. It's a lie. How do I know? Well, I tired it for six months, then I broke down. I thought that the less I slept, the more time I had to create. But soon, I found that having less sleep also meant it's easier to be distracted (分心) and stressed. I felt worse every week.

　　"Sleep more or take pills. Your choice，" the doctor told me. I did. It worked. By sleeping more, I became more productive, I could focus better, and my mood improved a lot.

　　What I learned is that the first thing you need to become happier, healthier, smarter, stronger and more creative is not more exercise. You need more sleep first.

One out of three people nods off while driving. 100,000 of preventable accidents happen in the U．S. each year. If you're sleepy while driving to work, you'll drive as if you had three beers for breakfast. Don't be that person. If you feel that you are sleep­deprived (睡眠不足的), this is what you could do today：