China is a country of many resources. Among its resources are many great rivers, which provide useful transport routes. Water transport is an efficient way to carry heavy loads, such as grain. In ancient times, a waterway was needed between China's rich farmlands and the capital city. This need inspired engineers to build a canal. According to writings by the ancient thinker Confucius, work on a canal linking the Yangtze River with the city of Huai-in began about 486 B.C. For many centuries afterward, Chinese emperors worked on extending this ancient canal.

    This canal is now known as China's Grand Canal. One thousand years after the original canal was begun, it was in extreme need of repair. This was in the year 607, during the Sui Dynasty. By 610 the emperor had had the canal extended. The Grand Canal formed a northeast-southwest link between the Yellow River in the north and the Huai River in the south. The canal remained the main waterway in this part of China for the next five hundred years.

    In the thirteenth century, the Mongols had conquered China. The Yuan Dynasty established Beijing as the capital. The city's growing population needed food, so a new canal was built to extend shipping. Building this part of the Grand Canal required enormous effort and cost. Neither the first attempt nor the second one was successful, so the builders chose another route. Finally this link in the Grand Canal was finished.

    By the time of the Ming Dynasty, the Grand Canal had six sections. These were busy with goods until the nineteenth century. Then a series of severe floods struck China. Parts of the Grand Canal were badly damaged. By 1868 it had been largely abandoned as a means of northern route.

    The Grand Canal was mostly restored in the twentieth century. It was widened and deepened, and a new section was constructed. Today the canal, which is about 1,200 miles in length, has new locks(运河的水闸). It is busy with ships and barges(驳船) carrying goods to and from cities along its banks.

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    Do you often dream at night? How do you feel when you dream? Is it useful to our health? “Dreams may be more important than sleep, and we all need to dream,” some scientists say.

    Dreams take up about one quarter of our sleeping time. People have several dreams each night. Dreams are like short films. They are usually in colour. Some dreams are like old films. They come to us over and over again. That may be because the dreamer is worrying about something. Dreaming may be a way of trying to find an answer. Some people get new ideas about their work from dreams. They may have been thinking about their work all day. These thoughts can carry over into dreams.

    Sometimes we wake up with a good feeling from a dream. But often we can't remember the dream. Dreams can disappear quickly from memory.

    Too much dreaming can be harmful. The more we sleep, the longer we dream. The mind is at work when we dream. That is why we may have a long sleep and still wake up tired.

    People living in the country enjoy several advantages that people living in the city cannot enjoy.

    They are in close contact (接触)with nature. They make friends with trees and stones. They breathe fresh air. They fight with strong winds. They listen to the song of birds. This contact with nature is good for health. There are many diseases that are common in the city, but are not to be found in the country. For example, near­sightedness is almost unknown to country people. Because of the absence of cars, one can walk more freely in the country than in the city. There are no rules of the road nor traffic signs to obey. People living in the country can easily get fresh vegetables, fresh fruit and fresh milk, and they get them at lower prices than in the city. Country life is economical (节俭的)in other ways, too. There are practically no temptations to waste money.

    Country people are mostly honest. They say what they mean, and make and keep promises with sincerity (诚意). They do not put on air (摆架子). They do not pretend to have those ridiculous (荒谬的)manners which are necessary in what we call polite society.

Dear Jamie,

    I'm writing to you because I feel like we've grown distant lately. I know you have two little babies now that take up most of your attention, but I want to remind you that I'm your dog. My name is Max, and I am here long before those two troublemakers joined our family. The older one, Hannah, keeps trying to ride me. She knows I'm not a horse, right? Let's remember that I'm 11 now. That's 77 years old to you, friend. So how about showing me some respect I deserve?

    Anyway, I'm still an official part of this family. I know I have made mistakes with food, but those kids are covered with so much food. It's like an alcoholic living in a wine store. I have tried harder not to eat their food, but this business of forcing me to the backyard for most of the day was unacceptable.

    And when you told your wife Kate that you wanted to drop me off in the valley to live with wolves, well, that hurt my self-respect. And did you have to do it right in front of me? I might be old, but I can still hear.

    Remember the old days? By the time you came into the picture, I had already known Kate for three years. And then you came along. I knew she liked you so I welcomed you into our world. I remembered one night, she asked me if I thought you were the one. I barked "yes" repeatedly because I thought you would take great care of us. And you did.

    Look, I know you're a father of two now, but please try to include me a little bit more. That's all I'm asking.

Sincerely yours,

Max the Puggle

In San Francisco,a large group of sea lions move themselves out of the bay waters and hang out on PIER 39, which is a popular tourist destination. According to dock（码头） officials, this is the most sea lions seen in the region in 15 years.

"Over 1,000 sea lions have been counted this week," PIER 39 harbor master Sheil a Chandor told many different medias. "The increase in sea lions is usually a good sign of their strong population and healthy living environment," said Adam Ratner, Director of Conservation Engagement at the Marine Mammal（海洋哺乳动物） Center in Sausalito, California.

"California sea lions are sentinels（哨兵） of the ocean," Ratner said. Their population to some extent reflects the health of the ocean. Therefore, seeing a large number of California sea lions is clearly a good thing.

For nearly 35 years, the animals have been a star attraction for visitors. That autumn in 1989, PIER 39 had just been repaired, but the ships had not yet been moved back. At that moment, the sea lions' unexpected arrival not only attracted fans but also created enemies. According to a website, some dock residents and workers were scared away by the strong and very unpleasant smell and noise of their new neighbors, while others saw these animals as a bright spot after the destructive Loma Prieta earthquake.

The officials sought help from the Marine Mammal Center to find a way to deal with sea lions. Ratner said that the final decision is to let the sea lions stay and coexist with humans. "The fact proves that this is really a good thing," he said. "This is just a proof of how we can truly work together and think about how we can share our coasts with marine mammals and other wildlife in a way that benefits all the parties involved."