5．What do you usually have for lunch？Indeed，for many of us，meat has been part of our diet for years．
For your American peers，however，school lunch might have to change this year-there could be less meat and more fruits，vegetables，nuts，whole grains and other plant-based foods for them in future．
Their new diet would encourage Americans to eat more healthily．But it could mean much more than that．According to the Fox Business website，the new school lunch also looks at what is healthy for the environment．A diet higher in plant-based foods and lower in animal-based foods causes"less environmental damage than the current average US diet"，a research from a US government committee said．
No matter how tasty you think meat is，it seems to be causing problems for the environment．Researchers from the International Livestock（家禽）Research Institute in Kenya and the Commonwealth Scientific and Industrial Research Organization in Australia and the International Institute for Applied Systems Analysis in Austria looked at the livestock industry around the world and found that it is adding to climate change．
In poorer countries like Ethiopia and Somalia，1，000kg of carbon is produced for every kilogram of protein produced by cattle．This happens because of the methane（甲烷）gas that comes from the cattle's manure（粪便）．When forests are cut down to make land for livestock like cattle，the trees can no longer absorb carbon，which then goes to the atmosphere．
Although groups like the National Cattlemen's Beef Association in the US are unhappy with the idea，environmental groups would be happy if the changes happened．"We need to make sure we think about our natural resources and the need to reduce climate change when we choose our diets，"said Karl Hamerschlag of the group Friends of the Earth．
So，would you give up meat for the good of the environment，or does beef taste too good for you to support these plans？
25．What change will take place in American school lunches？D
A．Some tasty dishes will be added to their menus．
B．More animal-based foods will be offered．
C．Only less nutritious foods will be provided．
D．Students will be given more plant-based foods．
26．What is the real purpose of the new diet in America？B
A．To help students eat more healthily．
B．To help improve the environment．
C．To carry out a research．
D．To add nutrition to school lunch．
27．Which group might not be in favor of the new diet？D
A．The International Livestock Research Institute．
B．The Commonwealth Scientific and Industrial Research Organization．
C．The International Institute for Applied Systems Analysis．
D．The National Cattlemen's Beef Association．
28．What does the writer mainly tell us？C
A．School lunch must be changed in America in future．
B．Eating less meat and more fruits can keep us healthy．
C．Eating less meat helps to improve the environment．
D．Cattle'manure releases too much methane gas．
分析 本文属于说明文阅读，作者通过这篇文章主要向我们描述了美国学校午餐会提供更多的植物性食物，这可以帮助改善环境．
解答 25．D．细节理解题．根据第二段however，school lunch might have to change this year-there could be less meat and more fruits，vegetables，nuts，whole grains and other plant-based foods for them in future可知美国学校午餐会提供更多的植物性食物；故选D．
26．B．细节理解题．根据第三段A diet higher in plant-based foods and lower in animal-based foods causes"less environmental damage than the current average US diet"，a research from a US government committee said可知美国新饮食的真正目的是帮助改善环境；故选B
27．D．推理判断题．根据倒数第二段Although groups like the National Cattlemen's Beef Association in the US are unhappy with the idea，environmental groups would be happy if the changes happened可知美国牛肉协会不赞成新的饮食；故选D．
28．C．推理判断题．根据最后一段So，would you give up meat for the good of the environment，or does beef taste too good for you to support these plans可知作者主要告诉我们少吃肉类有助于改善环境；故选C．
点评 考察学生的细节理解和推理判断能力，做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确的选择．在做推理判断题不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．
