2．Think about the different ways that people use wind．You can use it to fly a kite or to sail a boat．Wind is one of our cleanest and richest power sources，as well as one of the oldest．Evidence shows that windmills（风车） began to be used in ancient Iran back in the seventh century BC．They were first introduced to Europe during the 1100s，when armies returned from the Middle East with knowledge of using wind power．
For many centuries，people used windmills to grind（磨碎） wheat into flour or pump water from deep underground．When electricity was discovered in the late 1800s，people living in remote areas began to use them to produce electricity．This allowed them to have electric lights and radio．However，by the 19 40s when electricity was available to people in almost all areas of the United States，windmills were rarely used．
During the 1970s，people started becoming concerned about the pollution that is created when coal and gas are burned to produce electricity．People also realized that the supply of coal and gas would not last forever．Then，wind was rediscovered，though it means higher costs．Today，there is a global movement to supply more and more of our electricity through the use of wind．
28．From the text we know that windmillsC
A．have rarely been used since electricity was discovered
B．have a history of more than 2，800 years
C．used to supply power to radio in remote areas
D．were invented by European armies
29．What was a new use for wind power in the late 19gh century？C
A．Sailing a boat．
B．Grinding wheat into flour．
C．Producing electricity．
D．Pumping water from underground．
30．One of the reasons wind was rediscovered in the 1970s is thatB
A．it is one of the oldest power sources
B．wind power is cleaner
C．it was cheaper to create energy from wind
D．the supply of coal and gas failed to meet needs
31．What would the author probably discuss in the paragraph that follows？
B
A．The adv antages of wind power．
B．The global trend towards producing power from wind．
C．The worldwide movement to save energy．
D．The design of wind power plants．
分析 文章介绍风能发展的过程和用途，并介绍全球已越来越多地使用风力发电，因为它的清洁环保的能源．
解答 C C B B
28．C：细节理解题．根据第二段的"When electricity was discovered in the late 1800s，people living in remote areas began to use them to produce electricity．This allowed them to have electric lights and radio．"可推出风车可以给遥远的地方的无线电提供电力，C项符合题意．
29．C：细节理解题．根据第二段的"When electricity was discovered in the late 1800s，people living in remote areas began to use them to produce electricity．"可知在19世纪末期，风车可以用来发电，C项符合题目要求．
30．B：细节理解题．根据第三段的"people started becoming concerned about the pollution that is created when coal and gas are burned to produce electricity"可知现在重新使用风能是因为它是清洁的，B项符合题意．
31．B：推理判断题．第三段最后已提出现在全球已越来越多地使用风力发电，所以下一段应该要进一步推广使用风力发电，这是一种总体的能源发展趋势．故B项正确．
点评 做阅读理解时要快速的浏览全文，把握文章主旨大意，带着问题回到原文，寻找细节或概括相应的答案，最后要理清作者写作思路．
