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1、Unit 3 A healthy life Nearly a million American youngsters， some as young as 6，rely onpersonal trainers to shape up(塑身)， lose weightor improve in sports. Many parents， worried about their childrensweight and fitness， say that working with a trainer motivates (激发) their kids and helps them build conf
2、idence. So they arewilling to spend the D|S40 to D|S60 an hour that trainers generally charge.,The Bostonbased groups latest figures， from 2005， show that 824，000 children between the ages of 6 and 17 use trainers.With many high school students not getting exercise at school， more parents are turnin
3、g totrainers to help their children stay fit. More than onethird of American children are overweight andexperts warn of future health problems ahead from diabetes (糖尿病) to heart disease.,Kathleen Ballew said that her 7yearold son， Jordan Sims， who would begin second grade in the fall， couldbenefit f
4、rom some oneonone time with a fitness professional. She had noticed that he needed help with balance and coordination (协调能力) in soccer and karate (空手道). She also observed that he did not want to do things that kids normally did， like climbing on park equipment. After Jordan had begun working out at
5、Baylor Tom Landry Fitness Center in Dallas with a trainer about a year before， he moved more naturally and confidently. His trainer， Lauren Jacobson， works with about half a dozen kids under 18. She said she noticed that training helped build confidence and a senseof accomplishment， along withhelpin
6、g kids get in better shape.Section_Warming Up & Reading Prereading,ADVICE FROM GRANDADDear James，It is a beautiful day here and I am sitting under the big tree at the end of the garden. I have just returned from a long bike ride to an old castle. It seems amazing that at my age I am still fit enough
7、 to cycle 20 kilometres in an afternoon. Its my birthday in two weeks time and Ill be 82 years old! I think my long and active life must be due to the healthy life I live.This brings me to the real reason for my letter, my dear grandson. Your mother tells me that you started smoking some time ago an
8、d now you are finding it difficult to give it up. Believe me, I know how easy it is to begin smoking and how tough it is to stop. You see, during adolescence I also smoked and became addicted to cigarettes.at the end of 在的尽头/末端在It seems amazing that .中， that引导主语从句，it是形式主语。due to 由于due/dju/adj.欠款的；预定
9、的；到期的此处第一个it是形式宾语，真正的宾语是动词不定式短语to give it up。tough/tf/adj.困难的；强硬的adolescence/dlesns/n.青春期adolescent/dlesnt/n.青少年 adj.青春期的addicted to对有瘾addicted/dIktId/adj.入了迷的；上了瘾的爷爷的忠告亲爱的詹姆士：今天这儿的天气很好。我正坐在花园尽头的那棵大树底下呢。我刚刚才回来，骑自行车跑了很长一段路，一直到了古城堡。这好像很惊奇吧，在我这样的年纪，仍然身体足够健康能在一个下午骑车跑20千米。再过两个礼拜就是我82岁的生日了！我想我(之所以)长寿而且精力充
10、沛，要归功于我过的健康生活。这就是我写信给你的真正原因，我亲爱的孙子。你妈妈告诉我，你不久前开始吸烟了，而且现在你发现很难把它戒掉。相信我吧，我知道开始吸烟是多么容易而戒烟是多么困难。你知道，当我还是一个十几岁的孩子的时候，我也吸过烟，而且对烟还上了瘾。By the way, did you know that this is because you become addicted in three different ways? First， you can become physically addicted to nicotine, which is one of the hundred
11、s of chemicals in cigarettes. This means that after a while your body becomes accustomed to having nicotine in it. So when the drug leaves your body, you get withdrawal symptoms. I remember feeling badtempered and sometimes even in pain. Secondly, you become addicted through habit. As you know, if y
12、ou do the same thing over and over again， you begin to do it automatically. Lastly, you can become mentally addicted. I believed I was happier and more relaxed after having a cigarette, so I began to think that I could only feel good when I smoked. I was addicted in all three ways, so it was very di
13、fficult to quit. But I did finally manage. first和下文的secondly, lastly等连用，表示顺序。which引导非限制性定语从句，修饰nicotine。accustomed/kstmd/to 习惯于withdrawal/wIdrl/n.收回；戒毒过程badtempered adj.脾气暴躁的；易怒的as引导定语从句，if引导条件状语从句。automatically/tmtIklI/adv.无意识地；自动地mentally/mentlI/adv.精神上；智力上quit/kwIt/vt.停止(做某事)；离开在“do/does/did动词原形”
14、结构中，do/does/did为助动词，意为“确实；的确”，用于肯定句，起加强语气的作用，有人称和时态的变化。这儿我顺便问你一个问题，你知道上瘾有三个不同方面的原因吗？首先，你会在身体上对尼古丁有瘾，它是香烟里几百种化学物质之一。这就是说，过一段时间以后，你的身体习惯了香烟里的尼古丁。因此一旦你的体内没有这种麻醉剂了，你就会有脱瘾症状。我记得曾感到烦躁，有时甚至痛苦。其次，你也可能因为习惯而上瘾。你知道，如果你反反复复地做同一件事情，你就会开始自动地做它。最后，你可能在心理上上瘾。我那时认为，抽了一支烟后就会感到更轻松愉快，于是我就开始认为只有抽烟才能使自己感觉良好。我(之所以)上瘾共有三个方
15、面的原因，因此，要戒烟就很难。但是我最终还是戒掉了。When I was young, I didnt know much about the harmfuleffects of smoking. I didnt know, for example, that it could do terrible damage to your heart and lungs or that it was more difficult for smoking couples to become pregnant. I certainly didnt know their babies may have a smaller birth weight or even be abnormal in some way. Neither did I know that my cigarette smoke could affect the health of nonsmokers. However, what I did know was that my girlfriend thought I smelt terrible. She said my breath and clothes smelt, and that the e
