Since the beginning of human evolution, men have migrated（迁移）across continents in search of food, shelter, safety, and comfortable weather. People still move for these reasons, but new reasons for human migration are arising, such as job relocation(重新安置) and overpopulation.

    Three million migrants are moving from poor countries to wealthier ones each year, and increasingly, their destination is a neighboring country in developing parts of the world. People are moving within the developing world for the same reasons as they migrate to wealthier nations. People from poor countries are going to less poor countries, fleeing wars and conflicts. They are also responding to population pressures because some countries are densely populated, and they often have high population growth. Those people need to go somewhere else.

    There are three main reasons why people move. The basic categories and percentages are as follows, according to the Current Population Surveys (CPS):

    Family-related reasons account for 26.3%, including changes in marital（婚姻的） status, establishing a household and other family reasons; work-related reasons 16.2%, including job transfer, retirement, and other job-related reasons; housing-related reasons 51.6%, including new and better houses, better neighborhood, cheaper housing and other housing reasons; the remaining 5.9% of other reasons are attending college, the change of climate and health reasons.

    Americans have been migrating south and west for decades in search of better job opportunities and warmer climates. They have also been moving to places a little far from cities, in search of bigger yards and houses, lower crime rates and better schools. In 1950, nearly a fifth of the population lived in the nation's 20 largest cities. In 2006, it was about one in ten. That's why many American people say, “Big Cities Shrink as People Move South, West.”

    Between March 2005 and March 2007, 73.4 million Americans moved. Fifty-six percent of these moves were within the same country. Twenty percent were between counties but in the same state. Nineteen percent were moves to a different state. Some families even went abroad.

Title: People on the {#blank#}1{#/blank#}

    Do you love traveling? If the answer is yes, then have you ever thought about why? You may argue that traveling can help you enrich your knowledge, especially geographical and historical learning. It will provide more chances for you to enjoy food and try on clothes that you otherwise cannot possible have. A famous English author Francis Bacon (1561-1626) makes a point when he says that, “Travel, in the younger sort, is a part of education; in the elder, a part of experience.”

    Evidence of leisure travel can be traced as far back as ancient Babylon. This year, according to the World Travel & Tourism Council, the 1 billionth tourist will cross an international boundary before the end of this month. That means that one in seven people on the planet traveled this year, something that would not have been possible a few decades ago. Around 20 years ago only the rich could travel.

    While the US and France remain the two largest destinations for world travel, experts say much of the explosive growth in tourism has been to countries like Guatemala, the Dominican Republic, and the Ivory Coast, which weren't even on the world tourism map a decade ago. The top five destinations in the world, according to the United Nations World Tourism Organization, are Paris, London, New York, the Mediterranean, Turkey.

    Several factors have led to the boom in world travel. The prosperity (富裕) of people in Asia is one factor. People in Asian developing countries have lifted their incomes above middle-class levels in the past few years. And a lot of them have used their new wealth to travel. In addition, travel costs have been reduced thanks to the rapid development of transportation, and competition between airlines to give customers the best prices.

    Thomas Edison was one of the most successful inventors the world has ever seen.{#blank#}1{#/blank#}

    But people found that although Edison was good at inventing new things, he was a poor fisherman. He used to spend an hour almost every day sitting at the side of a river and fish. He always fished all alone by himself.{#blank#}2{#/blank#}

People asked Edison, “Why are you so crazy about fishing when you are so bad at it?” His answer was, “I really never caught ant fish because I have never used any bait (诱饵).” Another question followed, “Why would you fish without bait?” Edison answered, “Because when you fish without bait, people don't disturb you and neither do the fish{#blank#}3{#/blank#}”

    Sometimes the world's best inventor was the world's worst fisherman. In fact, because Edison was the world's worst fisherman, he could become the world's greatest inventor.

    Are you setting aside some time for yourself to think?{#blank#}4{#/blank#} Here are some ideas for you:

    Slowing down and taking long showers is a good idea.

    {#blank#}5{#/blank#}

    Long walks are good too.

    Afternoon naps have been proved to improve creativity.

A. But he never caught any fish.

B. It provides me my best time to think.

C. So is listening to some soft classical music.

D. In all, Edison has thousands of inventions.

E. He was asked the reason behind him being a fisherman.

F. To make your brain work better, you need to take a rest.

G. Set aside 15-20 minutes per day so that you can do nothing.

注意：每个空格只填1个单词。

    New discoveries suggest that trade between Europe and Asia along the Silk Road probably began many centuries earlier than once thought. The findings add a fascinating new page to the epic(史诗）of the Silk Road, which spread far and wide in no time.

    The latest and most surprising discovery is pieces of silk found in the hair of an Egyptian mummy from about 1,000 BC, long before regular traffic on the Silk Road and at least one thousand years before silk was previously thought to be used in Egypt. Other research may extend human activity along this route back even further, perhaps a million years to the moving of human ancestors into eastern Asia

    The official origin of East-West trade along the road is usually placed in the late 2nd century BC when an agent of the Chinese Emperor Wudi returned from a dangerous secret mission across the desert into the remote high country of Central Asia. The agent, Zhang Qian, traveled as far as Afghanistan and brought back knowledge of even more distant lands such as Persia, Syria and a place known as Lijien, perhaps Rome. Historians(历史学家）have called this one of the most important journeys in ancient times. His journey opened the way for what have been thought to be the first indirect contacts between the ancient world's two superpowers, China and Rome. Chinese silk, first traded to Central Asia for war horses, was soon finding its way to the markets of Rome through a network of businessmen.

    But the new discoveries show that Chinese silk apparently existed in the West long before the Han emperor started organized trade over the Silk Road. The research could change thinking about the early history of world trade and provide insights into the mystery(谜) of just how and when Europe first realized the glorious culture at the other end of Eurasia.

    Recently, in the quest for a selfie (自拍), a woman climbed over the concrete barrier of a Jaguar (美洲虎) enclosure at Wildlife World Zoo, Arizona. The jaguar ripped into her arm. Bystanders pulled her away before the animal could injure her further. She's fine-so is the jaguar.

    This isn't the first time a story of a person acting rudely to get close to a wild animal made headlines. Last year, a man jumped into a lion enclosure at a zoo for a close-up photo. {#blank#}1{#/blank#} Multiple tourists in Yellowstone National Park have been attacked by bison (野牛) when they've gotten too close for a photo.

    It's common sense not to get close to wild animals that can hurt you. It's why zoos have barriers -sometimes multiple walls-to keep people separated from animals. Signs posted everywhere state the obvious warning. Keep your hands off the cage.

    "Yet animals have become less real to us," says an environmentalist. We see exotic animals most frequently in managed settings like zoos. {#blank#}2{#/blank#} People are trying to take advantage of their rarity to show off on social media and ignore their fierceness.

    Media often normalize interaction with dangerous animals. Seeing a man like "Lion Whisperer" Kevin Richardson regularly play-fight with lions on TV, may send the message that these animals aren't so dangerous after all.

    Social media are also perfectly positioned to contribute to the rise of animal selfies. Getting likes and comments provide instant satisfaction. Your self-esteem actually gets a temporary boost. To hold onto that feeling, people may go to more and more extremes to showcase the most exciting versions of themselves. It may not be enough to get a photo of a beautiful, dangerous animal from outside a cage. {#blank#}3{#/blank#}

    People's careless approach can put the animal's safety at risk as well. Zoo animals often must be killed to protect the person who's entered their space. In fact, thrill-seekers actively endanger the lives of animals. {#blank#}4{#/blank#} with the zoo environment, they take it for granted that animals are there for people, ignoring the fact that animals and humans are both equal existents in the nature.

   "My work is done." Those words were some of the last penned by George Eastman. He included them in his suicide note. They mark an ignoble end to a noble life, the leave taking of a truly great man. The same words could now be said for the company he left behind. Actually, the Eastman Kodak Company is through. It has been mismanaged financially, technologically and competitively. {#blank#}1{#/blank#} One of America's bedrock brands is about to disappear, the Kodak moment has passed.

    But George Eastman is not how he died, and the Eastman Kodak Company is not how it is being killed. Though the ends are needless and premature, they must not be allowed to overshadow the greatness that came before. Few companies have done so much good for so many people, or defined and lifted so profoundly the spirit of a nation and perhaps the world. {#blank#}2{#/blank#}

    Kodak served mankind through entertainment, science, national defense and the stockpiling of family memories. Kodak took us to the top of Mount Suribachi and to the Sea of Tranquility. It introduced us to the merry old Land of Oz and to stars from Charlie Chaplin to John Wayne, and Elizabeth Taylor to Tom Hanks. {#blank#}3{#/blank#} When that sailor kissed the nurse, and when the spy planes saw missiles in Cuba, Kodak was the eyes of a nation. From the deck of the Missouri to the grandeur of Monument Valley, Kodak took us there. Virtually every significant image of the 20th Century is a gift to generation from the Eastman Kodak Company.{#blank#}4{#/blank#} Yes, there were photographers, and for relatively large sums of money they would take unnatural pictures in studios and formal settings. But most people couldn't afford photographs, and so all they had to remember distant loved ones, or earlier times of their lives, was memory. Children could not know what their parents had looked like as young people, grandparents far away might never learn what their grandchildren looked like. Eastman Kodak allowed memory to move from the uncertainty of recollection, to the permanence of a photograph. But it wasn't just people whose features were savable; it was events, the precious times that families cherish. The Kodak moment, was humanity's moment.