Walking will be banned on escalators as part of a trail designed to reduce congestion(拥堵) at some of the country's busiest stations.

        In the first move of its kind, all travelers will be forced to stand on both sides of escalators on the London Underground as part of a plan to increase capacity(容量) at the height of the rush hour.

         A six-month trial will be introduced at Holborn station from mid-April, eliminating the rule of standing on the right and walking on the left. The move, imitating a similar structure in Far eastern cities such as Hong Kong, is designed to increase the number of people using long escalators at the busiest times. It could be expanded across the Tube network in coming years.

     According to London Underground, only 40percent of travelers walk the full length of long escalators, leaving the majority at the bottom as they wait to get on to the “standing “side.

       A three-week trial at Holborn last year found that the number of people using escalators at any time of could be raised by almost a third. Peter McNaught, operations director at London Underground, said: “It may not seem right that you can go quicker by standing still, but our experiments at Holborn have proved that it can be true. This new six-month trial will help us find out if we can influence customers to stand on both sides in the long term.”

      Holborn has one of the longest sets of escalators on the Underground network at 23.4high. Tube bosses claim that capacity was limited because so few people wanted to walk up—meaning only one side was used at all times. Research has shown that it is more effective use of escalators over 18.5 to ban walking.

      The previous trial found that escalators at the station normally carried 2,500people between 8:30 am and 9:30 am on a typical day, rising to 3,250 during the researching period.

      In the new trial, which will be launched from April 18, one of three “up” escalators will be standing only, with a second banning walking at peak times. A third will remain a mix of walking and standing.

(Note: Answering the questions or complete the statements in NO MORE THAN TEN WORDS.)

请阅读下面短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。

注意：请将答案写在答题卡上相应题号的横线上。每个空格只填一个单词。

Population Change

    Why is the world's population growing？The answer is not what you might think. The reason for the explosion is not that people have been reproducing like rabbits, but that people have stopped dropping dead like flies. In 1900,people died at the average age of 30.By 2000 the average age was 65.But while increasing health was a typical feature of the 20^th century, declining birth rate could be a defining one of the 21^st.

     Statistics show that the average number of births per woman has fallen from 4.9 in the early 1960s to 2.5 nowadays. Furthermore, around 50% of the world's population live in regions where the figure is now below the replacement level(i.e.2.1 births per woman)and almost all developed nations are experiencing sub-replacement birth rate. You might think that developing nations would make up the loss(especially since80% of the world's people now live in such nations),but you'd be wrong, Declining birth rate is a major problem in many developing regions too, which might cause catastrophic global shortages of work force within a few decades.

     A great decline in young work force is likely to occur in China, for instance. What does it imply? First, China needs to undergo rapid economic development before a population decline hits the country. Second, if other factors such as technology remain constant, economic growth and material expectations will fall well below recent standards and this could invite trouble.

     Russia is another country with population problems that could break its economic promise. Since 1992 the number of people dying has been bigger than that of those being born by a massive 50%,Indeed official figures suggest the country has shrunk by 5% since 1993 and people in Russia live a shorter life now than those in 1961.Why is this occurring? Nobody is quite sure, but poor diet an above all long-time alcoholism have much to do with it. If current trends don't bend. Russia's population will be about the size of Yemen's by the year 2050.

     In the north of India, the population is booming due to high birth rates, but in the south, where most economic development is taking place, birth rate is falling rapidly. In a further twist, birth rate is highest in poorly educated rural areas and lowest in highly educated urban areas. In total,25% of India's working-age population has no education. In 2030,a sixth of the country's potential work force could be totally uneducated.

    One solution is obviously to import foreign workers via immigration. As for the USA, it is almost unique among developed nations in having a population that is expected to grow by 20% from 2010-2030,Moreover,the USA has a track record of successfully accepting immigrants. As a result it's likely to see a rise in the size of its working-age population and to witness strong economic growth over the longer term.

①{#blank#}1{#/blank#}  ②{#blank#}2{#/blank#}  ③{#blank#}3{#/blank#}  ④{#blank#}4{#/blank#}  ⑤{#blank#}5{#/blank#}  

⑥{#blank#}6{#/blank#}  ⑦{#blank#}7{#/blank#}  ⑧{#blank#}8{#/blank#}  ⑨{#blank#}9{#/blank#}  ⑪{#blank#}10{#/blank#}  

    The Internet has opened up a whole new online world for us to meet, chat and go where we've never been before.

    But just as in face to face communication, there are some rules of behavior that should be followed when on line. {#blank#}1{#/blank#} Imagine how you'd feel if you were in the other person's shoes.

    For anything you're about to send: ask yourself, “Would I say this to the person's face? If the answer is no, rewrite and reread. {#blank#}2{#/blank#}

    If someone in the chat room is rude to you, your instinct (本能 ) is to fire back in the same manner. But try not to do so. {#blank#}3{#/blank#} If it was caused by a disagreement with another member, try to fix the situation by politely discussing it. Remember to respect opinions of others in the chat room.

    {#blank#}4{#/blank#} Offer advice when asked by newcomers, as they may not be sure what to do or how to communicate. When someone makes a mistake, whether it's a stupid question or an unnecessarily long answer, be kind about it. If it is a small mistake, you may not need to say anything. Having good manners yourself doesn't give you license to correct everyone else. {#blank#}5{#/blank#} At the same time, if you find you are wrong, be sure to correct yourself and apologize to those you have offended.

    Population ageing refers to the situation in which the average age of the citizens of a country increases as a result of longer life expectancy（预期寿命）of its citizens or a reduction in the number of births every year.Today, both developed and developing countries around the world are experiencing an increase in the average age of its citizens with a growing proportion（比例）of elders in the population.

    An increase in the proportion of elderly persons in the population leads to a growing pool of volunteers.This has been considered as a global advantage where the elderly contribute free labor to community and government projects after retirement.These elders are more comfortable financially（财政上）and find pleasure in giving back to their communities and countries.Besides,older people are more experienced than younger people,and they can make use of their experience to help uphold morals（维护道德）and values in a country.

    What's more,an ageing population has something to do with fewer children.This can save much cost because less money has to be used to meet the needs of fewer children and young people in the economy.This would result in lower public education cost,lower health-care cost and other social programs that are provided for children by the government.

    However,there are also a lot of disadvantages.For example,an increase in the proportion of the elderly in the population raises questions as to how best to support them after retirement.Also older people are more likely to suffer from illnesses,so an increasing number of sick persons will put pressure on health care,which might not be able to meet the demand.

    Furthermore,an ageing population also increases competition for jobs,especially if the retirement age is extended（延长）.As older members of the population have a longer time to retire,young people will find it more difficult to find jobs.In this case,fewer innovations（创新）and changes take place in organizations because companies are limited to old ways of doing things.

    So,in order to solve these problems brought by an aging population,careful long-term strategic planning is required.The elderly are important and they have much to offer in helping the young people to understand their purpose in life.An increase in social enterprises（规划）should be the trend to help get the elderly involved in young people's lives.

    Be a Green Child

    What does it mean to be green? “Green” is more than just a color.{#blank#}1{#/blank#} Why green? Plants are green, and without them the Earth wouldn't be such a lovely home for us human beings. What can we do? Here's a four-step guide to being green.

    Reduce It!

    {#blank#}2{#/blank#} For instance, a shorter shower means you used less water and less fuel since your house uses to run the heater that warmed up the water.

    Reuse It!

    Sometimes people call ours a “throwaway society”. It means that we're a little to willing to throw away old stuff (东西) and buy new stuff.{#blank#}3{#/blank#}

    For instance, if your baby brother becomes older and loses interest in his plastic basketball hoop (篮圈), why not give it to another family who has a little kid?

    Recycle It!

    Recycling has never been easier. Many communities will pick it up right in front of your house and some towns even require it. Recycled goods go to a recycling center, where they can be turned into new cans, bottles, and paper.

    Enjoy It!

    It's true that rubbish and pollution are problems, but the Earth remains a huge and beautiful place that's ready for you to explore.{#blank#}4{#/blank#} Go for a hike, visit local nature centers and gardens, and climb up mountains.

    But before you travel the globe, take a look at your own backyard. Is there a spot where you could plant a tree or put in a little fruit or vegetable garden? {#blank#}5{#/blank#}

A. It also means taking special steps to protect the environment.

B. Many times, even if you no longer need something, someone else just might.

C. You can start locally by visiting the naturally beautiful spots in your city.

D. Turn off the water when you're brushing your teeth.

E. Get out there and get your hands dirty.

F. You can watch with pride as your tree takes root and your garden plants grow.

G. When you use less of something, you do a good thing for the Earth.

Evaluating Sources of Health Information

    Making good choices about your own health requires reasonable evaluation. A key first step in bettering your evaluation ability is to look carefully at your sources of health information. Reasonable evaluation includes knowing where and how to find relevant information, how to separate fact from opinion, how to recognize poor reasoning, and how to analyze information and the reliability of sources. {#blank#}1{#/blank#} 

    Go to the original source. Media reports often simplify the results of medical research. Find out for yourself what a study really reported,and determine whether it was based on good science. Think about the type of study. {#blank#}2{#/blank#}

    Watch for misleading language. Some studies will find that a behavior " contributes to " or is "associated with" an outcome; this does not mean that a certain course must lead to a certain result. {#blank#}3{#/blank#} Carefully read or listen to information in order to fully understand it.

    Use your common sense. If a report seems too good to be true, probably it is. Be especially careful of information contained in advertisements. {#blank#}4{#/blank#} Evaluate "scientific" statements carefully, and be aware of quackery (江湖骗术).

    {#blank#}5{#/blank#} Friends and family members can be a great source of ideas and inspiration, but each of us needs to find a healthy lifestyle that works for us.

    Developing the ability to evaluate reasonably and independently about health problems will serve you well throughout your life.

A. Make choices that are right for you.

B. The goal of an ad is to sell you something.

C. Be sure to work through the critical questions.

D. And examine the findings of the original research.

E. Distinguish between research reports and public health advice.

F. Be aware that information may also be incorrectly explained by an author's point of view.

G. The following suggestions can help you sort through the health information you receive from common sources.