7．Sports can help you keep fit and get in touch with nature．However，whether you are on the mountains，in the waves，or on the grassland，you should be aware that your sport of choice might have great influence on the environment．
Some sports are resource-hungry．Golf，as you may know，eats up not only large areas of countryside，but also tons of water．Besides，all sorts of chemicals and huge amounts of energy are used to keep its courses （球场） in good condition．This causes major environmental effects．For example，in the dry regions of Portugal and Spain，golf is often held responsible for serious water shortage in some local areas．
There are many environment-friendly sports．Power walking is one of them that you could take up today．You don't need any special equipment except a good pair of shoes； and you don't have to worry about resources and your purse．Simple and free，power walking can also keep you fit．If you walk regularly，it will be good for your heart and bones．Experts say that 20minutes of power walking daily can make you feel less anxious，sleep well and have better weight control．
Whatever sport you take up，you can make it greener by using environment-friendly equipment and buying products made from recycled materials．But the final goal should be"green gyms"．They are better replacements for traditional health clubs and modern sports centers．Members of green gyms play sports outdoors，in the countryside or other open spaces．There is no special requirement for you to start your membership．And best of all，it's free．
49．The author thinks the golf is resource-hungry because of the following EXCEPT thatD．
A．Golf wastes large areas of countryside
B．Golf runs out of much water
C．Keeping golf court in good condition needs too much energy
D．Golf is bad for people's health
50．According to the passage，which of the following is an environment-friendly sport？B
A．swimming in the pool B．hiking in the hills
C．playing basketball in the gym D．motor racing in the desert
51．The reason why the author uses power walking as an example mainly is becauseB．
A．it improves our health B．it uses fewer resources
C．it is an outdoor sport D．it is recommended by experts
52．The purpose of the author's writing this passage is toB．
A．show us the function of major sports
B．encourage us to go in for green sports
C．discuss the major influence of popular sports
D．introduce different types of environment-friendly sports．
分析 运动可以让人保持健康也可以让人们接近大自然．然而不管你是在大山里，还是草地上运动，都应该注意人们对运动的选择都可能会影响到地球的环境．在文章中作者鼓励人们要多进行环保的、不消耗自然资源的运动，比如疾走锻炼或者自行车运动等．
解答 49．答案 D 细节理解题 根据文章第二段内容 Golf，eats up not only large areas of countryside，but also tons of water．Besides，all sorts of chemicals and huge amounts of energy are used to keep its courses （球场） in good condition可知高尔夫球之所以是消耗资源的一项运动，是因为它占地多、用水多、维护起来耗费能源多，故答案选D．
50．答案 B 推理判断题 从文章第三段内容There are many environment-friendly sports．Power walking is one of them that you could take up today可知力量型步行或者疾走锻炼是既环保又健身的运动，所以B选项正确．
51．答案 B 细节理解题 文章第三段首先提出 There are many environment-friendly sports．然后介绍power walking：You don't need any special equipment except a good pair of shoes； and you don't have to worry about resources and your purse 由此可知作者用power walking 为例的原因是疾走锻炼是不消耗能源又健身的运动，答案选B．
52．答案B 写作目的题．文章采取总-分-总结构．第一段提出"选择不同的运动会对环境影响也不同"这一观点；第二段中，作者列举了一些运动耗费大量资源的例子；第三段中，作者以竞走为例，向读者说明"环境友好型运动"；第四段中，作者呼吁大家从事"绿色体育"，购买可回收材料制作的体育器械、进行户外运动等．文章的写目的主要是鼓励大家更多地参与到环保绿色的运动中．B项符合文意．故正确答案为B
点评 首先对原文材料迅速浏览，掌握全文的主旨大意．因为阅读理解题一般没有标题，所以，速读全文，抓住中心主旨很有必要，在速读的过程中，应尽可能多地捕获信息材料． 其次，细读题材，各个击破．掌握全文的大意之后，细细阅读文章后的问题，弄清每题要求后，带着问题，再回到原文中去寻找、捕获有关信息，最后 要善于抓住每段的主题句，阅读时，要有较强的针对性．对于捕获到的信息，要做认真分析，仔细推敲，理解透彻，只有这样，针对题目要求，才能做到稳、准．
