The world itself is becoming much smaller by using modern traffic and modern communication means.Life today is much easier than it was hundreds of years ago,but it has brought new problems.One of the biggest problems is pollution.To pollute means to make things dirty.Pollution comes in many ways.We see it,smell it,drink it and even hear it.

    Man has been polluting the earth.The more people,the more pollution.Many years ago,the problem was not so serious because there were not so many people.When the land was used up or the river was dirty in one place,man moved to another place.But this is no longer true.

    Man is now slowly polluting the whole world.

    Air pollution is still the most serious.It's bad for all living things in the world,but it is not the only one kind of pollution.Water pollution kills our fish and pollutes our drinking water.Noise pollution makes us angry more easily.

    Many countries are making rules to fight pollution.They stop people from burning coal in houses and factories in the city,and from putting dirty smoke into the air.Pollution by SO₂ is now the most dangerous kind of air pollution. It is caused by heavy traffic.We are sure that if there are fewer people driving,there will be less air pollution.

    The earth is our home.We must take care of it.That means keeping the land,water and air clean.And we must take care of the rise in pollution at the same time.

    They already guide blind and disabled people; now dogs are to be trained to help people with dementia(痴呆) or Alzheimer's. Alzheimer's can make people confuse night and day or forget basic things such as washing and drinking enough water.

    The dogs will be trained to respond to sound triggers(触发器) in the home that make them perform tasks. The duties will include reminding their owners to take medicine, as well as encouraging them to eat, drink and sleep regularly.

    The idea was developed by design students at the Glasgow School of Art and will now be put into practice by Alzheimer's Scotland and Dogs for the Disabled. The first dogs will be distributed to four Scottish couples, where one of the partners is in the early stages of dementia. 670,000 people in Britain have dementia and one in three over 65 will develop the condition. By 2021 this is expected rise to one million.

    John Gray of Alzheimer's Scotland said, "People in the early stages of dementia are still able to live a relatively normal life, and dogs help to maintain routine. " Another advantage of using the pets as companions is that dogs can give them a sense of silent support and companionship. Ms Gray said: "The evidence is that people may forget familiar faces but not pets. It's such a strong bond that people often remember them longest. People don't need to communicate verbally(口头上) but they can still interact. You can have a speechless bond."

    Helen McCain, director of Dogs for the Disabled, said, "People with dementia often forget to take medicine. If a dog presents them with a bag with pills in it, there is a greater chance of them taking it. The dogs would also encourage the owners to take them out for walks, ensuring they keep exercising and interacting with other people."

    Two of the saddest words in the English language are “if only”. I live my life with the goal of never having to say those words, because they convey regret, lost opportunities, mistakes, and disappointment.

    My father is famous in our family for saying “Take the extra minute to do it right”. I always try to live by the “extra minute” rule.  When my children were young and likely to cause accidents, I always thought about what I could do to avoid an “if only” moment，whether it was something minor like moving a cup full of hot coffee away from the edge of a counter, or something that required a little more work such as taping padding (衬垫)onto the sharp corners of a glass coffee table.

    I don't only avoid those “if only” moments when it comes to safety. It's equally important to avoid “if only” in our personal relationships. We all know people who lost a loved one and regretted that they had foregone an opportunity to say “I love you“ or “I forgive you”. When my father announced he was going to the eye doctor across from my office on Good Friday，I told him that it was a holiday for my company and I wouldn't be here. But then I thought about the fact that he's 84 years old and I realized that I shouldn't give up an opportunity to see him.  I called him and told him I had decided to go to work on my day off after all.

    I know there will still be occasions when I have to say “ if only” about something, but my life is definitely better because of my policy of doing everything possible to avoid that eventuality. And even though it takes an extra minute to do something right, or it occasionally takes an hour or two in my busy schedule to make a personal connection, I know that I'm doing the right thing. I'm buying myself peace of mind and that's the best kind of insurance for my emotional well-being.

    Six months ago,Jack came to china to study.He has heard that Yanghou is famous for its gardens. And he plans to visit some gardens in July, so he has collected information about them online as follows:

    The Slender West Lake named National AAAAA Tourist Area in 2010, includes the Great Rainbow Bridge, the White Pagoda, Five-pavilion Bridge, the Twenty-four Bridge, the Small Golden Hill and so on. The best time to tour the Slender West Lake is in March. During the visit to the park, the boat travels on the water and visitors travel in the picture.

    Ticket: Mar. - May. ¥ 150; Other months ¥90

    Time: 8:30 - 17:00

    Bus: No. 4, 5, 6, 17, 61 buses

    Tel: 0514-87357803; 0514-87370091

    Website: http://www.shouxihu.com

    Ge Garden, one of the four lop famous Chinese gardens, got its name from bamboo. The bamboo in the garden forms the green scenery. The centre of the garden is well known for man-like hills. Four seasons can be experienced here at a time.

    Ticket: Mar. - May. ¥ 10; Other months ¥30

    Time: Mar. - May. 7:15 - 18:00; Other months 7:15 - 17:30

    Bus: No. 8, 30, 61 buses

    Tel: 0514-87935285

    Website: http://www.gy-garden.net

    He garden, the most famous garden in the late Qing Dynasty, is known for its long double-way corridor(走廊), which is regarded as the earliest footbridge.

    Ticket: Mar. - May. ¥ 40; Other months ¥30

    Time: 7:30 - 17:15

    Bus: No. 19, 61 buses

    Te: 0514-87900345; 0514-87222353

    Website: http://www.he-garden.net

    Several years ago, Masaru Ibuka, chairman of Sony, was at a company planning a meeting. Suddenly he had a brilliant idea. He stopped the meeting and asked everyone present what would happen if Sony removed the recording function and speaker and sold headphones with a tape player instead. Almost everyone thought he was crazy. Still, Ibuka kept thinking about his idea and worked at improving it. The result, of course, turned out to be the wildly successful Sony Walkman.

    Good ideas often start with a seemingly silly question. Bill Bowerman was making breakfast one day. As he stood there making waffles (华夫饼干)for his son, he wondered what would happen if he poured rubber into his waffle iron. Later, he tried it and the result looked something like the bottom of most sports shoes we see today. Still, when he took this idea to several existing shoe companies, he was laughed at. In fact, every single company turned him down. Though rather discouraged, Bowerman insisted and went on to form his own company, making NIKE athletic shoes.

    Sometimes good ideas grow out of frustration .When Fred Smith was a student at Yale University, he had some paperwork that he needed to have delivered across the country the next day. Smith was amazed to find out that overnight delivery was impossible. He sat for a long while, lost in thought. Why couldn't there be a reliable overnight mail delivery service? He decided to design one. Smith did just that and turned his design into a class project.  His business professor gave him only a C for his efforts. However, Smith was not through. He improved the idea in that class project and finally turned it into one of the first and most successful overnight mail service in the world — FedEx.

    We know that each of these ideas led to a very successful product or service that has changed the way many of us live. The best questions are usually open-ended and are often silly, Children aren't afraid to ask such questions, but adults frequently are. Think how different the world might be if people never asked "silly" questions!

    What would it be like to live on Mars? Volunteers are spending eight months in an area that looks much like the surface of Mars. They are isolated(孤立)high on top of Mauna Loa, a volcanic mountain on the Big Island of Hawaii, living on a simulated(模仿的) or make-believe, Mars Base.

    The project called HI-SEAS is in the charge of Kim Binsted. She says this wild environment is as close to Mars as you can find on Earth. Because it is so high, the land is not warm or rich with plants, like the rest of Hawaii.

    "You will see there is really no visible plant life or animal life. And you have got this wonderful volcanic material."

    Mauna Loa, 2,500 meters above sea level, is geologically very similar to Olympus Mons on Mars and almost as tall as the Martian mountain. When measured from its base, deep in the ocean, Mauna Loa is the second largest mountain in our solar system, after the one on Mars.

    The six member HI-SEAS crew is mostly self-sufficient. Food and supplies are brought to them. But the individuals bringing those supplies cannot communicate with volunteers inside the habitat, or base.

    Kim Binsted says this experiment looks at how the astronauts get along with each other. "We study how well they work together, how we can keep them happy and supported, and not wanting to kill each other over these long durations (期间)."

    Crew members communicate with the outside world through e-mail and blogs. They also produce video on the YouTube website, like this one from mission commander Martha Lenio. "I am really enjoying this opportunity to live here and pretend that I'm on Mars and get to learn all sorts of new skills." One of them said. "Whoever gets there first, the trip will not be easy", says Kim Binsted, "It is going to be challenging."