As the population of the planet increases, so does the number of homes, businesses, parking lots, schools, airports and roadways． All these structures use electricity and need to be lighted． Humans demand these lights． They want their homes more comfortable and they want their streets sage． The problem is that researchers are finding that all the light is having a negative effect on humans and wildlife as well．

Less than 10 years ago I drove to a thinly populated section of my town, lay down in the middle of the road and watched an attracted meteor shower（流星雨）． The area was short of homes, street lights and traffic． If I did that today, I wouldn’t be able to see the meteor shower as well, and I would surely be run over by a car．

Nowadays scientists are finding light pollution can be almost as bad as carbon dioxide pollution． If you’ve ever taken a flight at night, the view is beautiful, but you must remember that all the light you see is wasted electricity． The crew of the space shuttles see an even bigger picture of how extensive the wasted electricity is worldwide．

Additionally, electricity needs to be generated, and the generation of electricity creates pollution by giving off greenhouse gases． This affects the air we breathe and our quality of life．

Scientists are also studying the effects of light pollution on wildlife． Thousands of birds die each year when they crash into highly lighted buildings, as they become puzzled by the light． It has been long known that tiny sea turtle hatchlings become lost and follow lights on the shore instead of heading towards the sea．

Fortunately, light pollution is one of the easiest sources of pollution that can be corrected without a negative effect． Following some guidelines and a little searching on Google can give you many ideas on how to reduce your contribution to light pollution．

67． The author tells the story in the second paragraph mainly to _________．

　　　 A． remember the past beauty of the town．

　　　 B． stress the advantages of less pollution

　　　 C． show the great changes of the town

　　　 D． prove the bad effects of light pollution

68． In the passage the author advises people _________．

　　　 A． to try to reduce unnecessary light．

　　　 B． not to ignore the beauty around．

　　　 C． to set proper light for animals

　　　 D． not to destroy the animal’s living conditions．

69． What can be inferred from the passage?

　　　 A． Light pollution is difficult to deal with．

　　　 B． Light pollution is a threat to some animals．

　　　 C． Light pollution has nothing to do with global warming

　　　 D． Astronauts can’t see clearly in space due to light pollution．

70． What is most likely to be discussed in the paragraph which follows the last paragraph?

　　　 A． The author’s contribution to light pollution

　　　 B． Other sources of light pollution

　　　 C． Ways of reducing light pollution

　　　 D． More bad effects of light pollution

Kalle Lasn was in a supermarket parking lot one afternoon when he had an experience that changed his life．In order to shop at the store, he needed to put money into the shopping cart to use it．Annoyed that he had to "pay to shop," Lasn jammed the coin into the cart so that it wouldn't work．It was an act of rebellion—the first of many—for Lasn．

Born in Estonia, Kalle Lasn moved to Australia as a young man and then later to Japan, where he founded a marketing research firm in Tokyo．Eventually, Lasn moved to Canada and for several years produced documentaries （纪录片） for public television．In the late 1980s, Lasn made an advertisement that spoke out against the logging industry and the deforestation going on in the Pacific Northwest．When he tried to show his ad on TV, though, no station in this area would give him airtime．In response, Lasn and a colleague founded Adbusters Media Foundation, a company for the "Human right to communicate．

　　　 Adbusters produces magazine, newspaper, and TV ads with a social message．Many use humor and irony to make their points: In one, for example, a man chain smokes a brand of cigarettes called "Hope"．In another, a child is dressed in an outfit used in fast-food ads．Next to the child is a note from its mother telling the restaurant to leave her child alone．[ http://wx.jtyjy.com/.Com]

Adbusters also has a magazine and a web site, the Culture Jammers Network, whose members include students, artists, and activists as well as educators and businesspeople interested in social change．Many of these "culture jammers" are working to raise awareness about different social issues by hosting events like "Buy Nothing Day" , " No Car Day" and "TV Turnoff Week" ．Lasn and his partners hope these events will encourage people to think about questions such as;

　　　 ·What kinds of things are we being encouraged to buy by the media?

　　　 ·Should cars be our primary means of transportation?

　　　 ·How are television and radio being used now? How could we be using them?

　　　 Some culture jammers are using other methods to challenge how people think．Some pretend to be shoppers．They move items in stores from one shelf to another making it difficult for people to find things easily．Other culture jammers break into large company well sites and jam them so that they become unusable．The goal in both cases ia to prevent "Business as usual" and to gel people to ask themselves questions such as "Why am I shopping here?" or "Why should I buy this product?"

　　　 Lasn and members of the Culture Jammers Network want to make people aware of social issues, but they also believe it's important to think of solutions, too．"A lot of people tell you everything that's wrong but they never say much about how to fix these problems," says Lasn．"But there is plenty we can do．If you start despairing, you have lost everything．"

　　　 Though many TV stations still won't show Adbusters' " uncommercials" , some cable TV stations have started to．People all over the world have joined the Culture Jammers Network and are doing their part to promote social change．

46．What does the underlined word "rebellion" in Paragraph 1 most probably mean?

　　　 A．argument　　　　　　 　　　　　　　　　 B．violence　　　　　 　

　　　 C．opposition　　　　 　　　　　　　　　　　　 D．protection

47．What's the main point of the ad for "Hope" cigarettes?

　　　 A．Smoking can help to remove your worries and make you hopeful．

　　　 B．Hopefully, the bad taste of the cigarette can help you to quit smoking．

　　　 C．You are hopeless at abandoning the habit of smoking．

　　　 D．Smoking can ruin you if you are hopelessly addicted to it．

48．Some culture jammers break into websites in order to ________．

　　　 A．ask people to be thoughtful consumers．

　　　 B．help make the companies better known．

　　　 C．encourage people to think less and buy less

　　　 D．challenge how people react to sudden changes

49．It can be inferred from the passage ________．

　　　 A．Adbusters Media Foundation was founded to fight against deforestation

　　　 B．More and more people will know about and even become culture jammers

　　　 C．The Culture Jammers Network is made up of annoying trouble makers

　　　 D．People can see some of Adbusters ads on TV stations

50．Which of the following best describes what Lasn has done?

　　　 A．One step at a time． B．We can and must change the world．

C．Accept what you can't change．　 D．Everyone deserves a second chance．