Electric cars are dirty.In fact，not only are they dirty，they might even be more dirty than their gasoline?powered cousins.

People in California love to talk about “zero?emissions vehicles”，but_people_in_California_seem_to_be_clueless_about_where_electricity_comes_from.Power plants mostly use fire to make it.Aside from the new folks who have their roofs covered with solar cells，we get our electricity from generators.Generators are fueled by something—usually coal，oil，but also by heat generated in nuclear power plants.There are a few wind farms and geothermal(地热的) plants as well，but by far we get electricity mainly by burning something.

In other words，those “zero?emissions” cars are likely coal?burning cars.It’s just because the coal is burned somewhere else that it looks clean.It is not.It’s as if the California Greens are covering their eyes—“If I can’t see it，it’s not happening.” Gasoline is an incredibly efficient way to power a vehicle；a gallon of gas has a lot of energy in it.But when you take that gas(or another fuel) and first use it to make electricity，you waste a nice part of that energy，mostly in the form of wasted heat—at the generator，through the transmission(传送) lines，etc.

A gallon of gas may propel your car 25 miles.But the electricity you get from that gallon of gas won’t get you nearly as far—so electric cars burn more fuel than gas?powered ones.If our electricity came mostly from nukes；or geothermal，or hydro，or solar，or wind，then an electric car truly would be clean.But for political，technical，and economic reasons，we don’t use much of those energy sources.

In addition，electric cars’ batteries which are poisonous for a long time will eventually end up in a landfill.And finally，when cars are the polluters，the pollution is spread across all the roads.When it’s a power plant，though，all the junk is in one place.Nature is very good at cleaning up when things are too concentrated，but it takes a lot longer when all the garbage is in one spot.

1. What does the underlined part mean in Paragraph 2?

A．People see the California Greens everywhere.

B．People in California love to talk about zero?emissions vehicles.

C．People in California love to have their roofs covered with solar cells.

D．People in California have no idea that so far electricity mainly comes from burning coal，oil，etc.

2. What is the main idea of the text?

A．Electric cars are not clean at all.

B．Electric cars are better than gasoline?powered ones.

C．People cast doubts on electric cars’ batteries.

D．Gasoline is an efficient way to power a vehicle.

3. The electricity we get from a gallon of gas may make our car run ________.

A．not less than 25 miles

B．as far as 50 miles

C．as far as 25 miles

D．not more than 25 miles

4. It can be inferred from the text that ________.

A．being green is good and should be encouraged in communication

B．electric cars are not clean in that we get electricity mainly by burning something

C．zero?emissions vehicles should be chosen to protect our environment

D．electric cars are now the dominant vehicle compared with gasoline?powered cousins

Computer people talk a lot about the need for other people to become “computer-literate.” But not all experts (专家) agree that this is a good idea.
One pioneer, in particular, who disagrees is David Tebbutt, the founder of Computertown UK. Although many people see this as a successful attempt to bring people closer to the computer. David does not see it that way. He says that Computertown UK was formed for just the opposite reason, to bring computers to people and make them “people-literate.” David Tebbutt thinks Computertowns are most successful when tied to a computer club but he insists there is an important difference between the two. The clubs are for people who have some computer knowledge already. This frightens away non-experts, who are happier going to Computertowns where there are computers for them to experiment on, with experts to encourage them and answer any questions they have. They are not told what to do, they find out.The computer experts have to learn not to tell people about computers, but have to be able to answer all questions people ask. People don’t have to learn computer terms(术语), but the experts have to explain in plain language. The computers are becoming “people-literate.”
【小题1】Which of the following is David Tebbutt’s ides on the relationship between people and computers?

What will city life be like in the future? Some people think that life in the cities is going to be horrible. They say that cities will become more and more crowded. As the number of people increases, there will be less space for each person. This overcrowding will cause other problems — more crime, dirtier streets , and worse problems with traffic than we have now. How will people find enough drinking water, energy (such as gas and electricity ), and housing? Because life will be hard, people who live in cities will worry more, and they may become sick. For these reasons, some say that nobody will want to live in city areas.

How can we deal with such problems as overcrowding, crime, and traffic? In some cities, thousands of people are already sleeping in the streets because there is little suitable housing — and because houses are too expensive. The crime rate isn’t going down. Instead, it is increasing so fast that many people are afraid to go out at night. Traffic is also getting worse. More and more often, traffic jams are so bad that cars don’t move at all for several streets. These problems have been getting worse, not better, so many people see no hope for the future of the city.

Los Angeles, California, for example, has no subway system and buses are slow. Instead, many commuters (乘、开车上班族) drive many miles from their homes to work. Many of these drivers spend several hours each day on busy freeways. New York, however, has a big transport system — buses, commuter trains, and subways. Because the public transportation is crowded and dirty, many people drive private cars, and the traffic jams are worse than that in Los Angeles. A taxi driver complains, “I was driving home, but in forty-five minutes I moved only two miles! Finally, I turned off the engine and just sat there. A lot of people left their cars where they were in the middle of the street and went into a bar for a few beers!”

On the other hand, some cities have clean, fast and pleasant public transportation systems. In Paris, France, and Toronto, Canada, for example, anyone can use buses or subways to move quickly from one part of the city to another.

1.What do some people think is the main problem of the future city like?

A．Poor housing.                          B．Overcrowding.

C．Environmental pollution.                  D．Traffic jams.

2.The best way to work out the traffic problem in Los Angels might be _________.

A．cutting down the number of private cars

B．providing more buses in the freeway

C．building a subway system

D．persuading people to live nearer to their workplaces

3.Which of the following sentences is NOT TRUE?

A．Thousands of people are already sleeping in the streets.

B．The crime rate isn’t going down.

C．The traffic jams are so bad that cars don’t move at all for several streets.

D．Many people have a positive attitude towards the future of the city.

They wear the latest fashions with the most up-to-date accessories(配饰)．Yet these are not girls in their teens or twenties but women in their sixties and seventies．A generation which would once only wear old-fashioned clothes is now favouring the same high street looks worn by those half their age．
Professor Julia Twigg, a social policy expert, said, “Women over 75 are now shopping for clothes more frequently than they did when they were young in the 1960s．In the 1960s buying a coat for a woman was a serious matter．It was an expensive item that they would purchase only every three or four years — now you can pick one up at the supermarket whenever you wish to．Fashion is a lot cheaper and people get tired of things more quickly．”
Professor Twigg analysed family expenditure(支出) data and found that while the percentage of spending on clothes and shoes by women had stayed around the same — at 5 or 6 percent of spending — the amount of clothes bought had risen sharply．
The professor said, “Clothes are now 70 percent cheaper than they were in the 1960s because of the huge expansion of production in the Far East．In the 1960s Leeds was the heart of the British fashion industry and that was where most of the clothes came from, but now almost all of our clothes are sourced elsewhere．Everyone is buying more clothes but in general we are not spending more money on them．”
Fashion designer Angela Barnard, who runs her own fashion business in London, said older women were much more affected celebrity(名流) style than in previous years．
She said, “When people see stars such as Judi Dench and Helen Mirren looking attractive and fashionable in their sixties, they want to follow them．Older women are much more aware of celebrities ．There’s also the boom in TV programmes showing people how they can change their look, and many of my older customers do yoga to stay in shape well in their fifties．When I started my business a few years ago, my older customers tended to be very rich, but now they are what I would call ordinary women．My own mother is 61 and she wears the latest fashions in a way she would never have done ten years ago．”
【小题1】Professor Twigg found that, compared with the 1960s, _________．

A．Age Is No Barrier for Fashion Fans	B．The More Fashionable, the Less Expensive
C．Unexpected Changes in Fashion	D．Boom of the British Fashion Industry

The scientific world continues to be amazed by the speed of the development of cloning. Some scientists now suggest that the cloning of humans could occur in the near future. Despite the benefits of cloning, however, certain ethical (道德的) questions concerning the possible abuse (滥用) of cloning have been raised. At the heart of these questions is the idea of humans influencing life in a way that could harm society, either morally or in a real physical sense. Some people object to cloning because it allows scientists to "act like God" in the handling of living organisms.

   The cloning of Dolly raised the debate over this practice to a whole new level. It has become obvious that the technology for cloning Dolly could also be used to clone humans. A person could choose to make two or ten or a hundred copies of himself or herself by the same techniques used with Dolly. An active debate about the morality of cloning humans arises. Some people see benefits from the practice, such as providing a way for parents to produce a new child to replace one dying of a fatal disease. Other people worry about humans taking into their own hands the future of the human race.

   At the beginning of the twenty-first century, many scientists say the controversy over the ethics of cloning humans is overstressed because of the unpredictability (不可预测性) of cloning in general. While scientists have cloned animals such as sheep, mice, cows, pigs, and goats, fewer than 3 percent of all those cloning efforts have succeeded. The animal clones that have been produced often have health problems. Scientists believe the rapid reprogramming in cloning can introduce random (任意的) errors into a clone’s DNA. Those errors have altered individual genes in minor ways, and the genetic defects (缺陷) have led to the development of major medical problems. Some scientists say this should make human cloning out of the question, but others argue that cloning humans may actually be easier and safer than cloning animals. Whatever, I agree that further research in the field of cloning is needed.

1.Some people are against cloning of humans because they think _________.

A．the practice takes too much time and money  B．the cloning technology is still not mature  C．humans control the future of the human race           D．the population in the world will be too large

2.Some scientists think the debate over ethics of cloning humans is overstressed because ____.

A．cloning of human beings is completely impossible                  B．the result of cloning can’t be predicted in general                    C．cloning of animals is a failure               D．there are big errors in a clone’s DNA

3.We can learn from the text that _______.

A．cloning of humans is a very controversial issue B．the cloning of Dolly begins to raise the debate over cloning of humans    C．there are medical problems in cloning animals         D．cloning humans is easier and safer than cloning animals

4.The text is mainly about _______.

A．the benefits of cloning                   B．the ethics of cloning C．the history of cloning  D．the defects of cloning