Training for a marathon requires careful preparation and steady, gradual increases in the length of the runs.{#blank#}1{#/blank#}, buy the best-fitting, best-built running shoes you can find. No one can say which brand will work best for you or feel best on your feet, so you have to rely on your experience and on the feel of each pair as you shop. When you have found shoes that seem right, walk in them for a few days to double-check the fit.{#blank#}2{#/blank#}.As always, you should stretch(仲展) at least ten minutes before each run to prevent injuries.

    During the first week, do not think about distance, but run five minutes longer each day.{#blank#}3{#/blank#} it is wise to take a day off to rest. But during the next week, set a goal of at least a mile and a half per run.{#blank#}4{#/blank#}.After two weeks, start timing yourself. {#blank#}5{#/blank#}.Depending on the kind of race you plan to enter, you can set up a timetable for the remaining weeks before the race.

A. After six days

B. For a good marathon runner

C. Before you begin your training

D. With each day, increase the distance by a half mile

E. If they still feel good, you can begin running in them

F. Time spent for preparation raises the quality of training

G. Now you are ready to figure out a goal of improving distance and time

    Yosemite is a national park in California. It is very beautiful and big. The park includes more than 760,000 acres (英亩) in the California Mountains. Most of the park is wild (荒凉的).

    The part of Yosemite that everyone likes is Yosemite Valley. It is a small valley that is 7 miles long and less than 1 mile wide. It has tall rock walls and streams that flow down in waterfalls. More than two million visitors come to the valley each year.

    It's said that the number of visitors is more than the land can hold. The valley has 4,500 camping places. It has a hotel that can hold 4,000 families. This is still not enough to serve all of the visitors. The valley has grown so big that it has a lot of traffic.

    A worker says the park is trying to keep the beauty of the park and let everyone visit. Some areas have been rounded up (圈起来) to keep people away and planted with seeds to try to keep them beautiful.

    A former worker thinks Yosemite should get more money to take better care of the park. He would also like to teach people what the park service is trying to do.

    Some people are trying to save Yosemite Valley. A plan has been made to remove some buildings. There will be fewer cars allowed inside the park. More buses will help get people around.

    Experts generally consider BMI for kids to be a good measure of body fat, at least among heavier children. But in some cases it might be misleading. Athletic kids, in particular, may fall into the overweight category when they are actually muscular.

    Your child's BMI is important, but it is only a piece of the picture. If a BMI percentile (体重指数) indicates that your child is not within the healthy range, she needs a complete weight and lifestyle evaluation with a doctor.

    Experts recommend that kids of all ages and all weight categories follow these healthy guidelines to keep weight in control. It's easy to remember them as “5 — 2 — 1 — 0” every day.

    5 > Everyone in your family needs five servings of vegetables and fruit. Keep serving them even if kids don't eat them. If they see a food over and over, they're more likely to try it in the end.

    2 > Limit TV-watching to no more than 2 hours a day. Family members who use other “screens”—video games or computers, for instance, get less TV time. And kick the TV out of all bedrooms.

    1 > Get 1 hour of physical activity. Add up the minutes each family member is moving —it should be 60 minutes or more for each person. Start small and keep adding if necessary.

    0 > That's how many sugar-sweetened beverages you should have a day. Juice drinks such as lemonade and fruit punch, sodas, tea, and coffee can all have added sugar. Stick to water and reduced-fat milk instead.

    The noise of chattering mouths subsided（平息）as the teacher entered classroom. “Good morning class. I am Riffat Monaf, and I will be your geography teacher.” Riffat Monaf, an interesting name and an even more interesting person. Her introduction took place about six years ago, and since then I have never met a more influential person in my life.

    Mrs Monaf not only conquered me with her vast knowledge of geography, but also won me over with her smile and warm eyes. It was in her class that I traveled to the highest mountains and to the deepest seas from the comfort of the classroom. I learned about the vast oceans, the erupting volcanoes, the snow-capped mountains and the green valleys. She would often relate her adventures about traveling to different parts of the world.

    Never can I forget the glory of her face when she talks about how truly beautiful this world is. If I search back my love for the environment and geography, I find her to be the source of my love for preserving nature. If one day I became an environmentalist, I know that I'll thank her for it. Apart from this, she has always greeted me with open arms and she calls her students “my children”. Mrs Monaf's morals and values rubbed off me deeply and I have always taken her advice into consideration. She has been one of the most consistently good things in my life.

    Currently, she is fighting a battle against breast cancer, and it pains me to know that after all she has done for me; I can do nothing for her except pray. Whenever I see her in school, she still keeps that kind smile and an expression so soft that it trembles my heart. Mrs Monaf still talks enthusiastically about geography, and I know that I can never see what a truly great person she has been in my life. .

    The values of artistic works, according to cultural relativism（相对主义）, are simply reflections of local social and economic conditions. Such a view, however, fails to explain the ability of some works of art to excite the human mind across cultures and through centuries.

    History has witnessed the endless productions of Shakespearean plays in every major language of the world. It is never rare to find that Mozart packs Japanese concert halls, as Japanese painter Hiroshige does Paris galleries. Unique works of this kinds are different from today's popular art, even if they began as works of popular art. They have set themselves apart in their timeless appeal and will probably be enjoyed for centuries into the future.

    In a 1757 essay, the philosopher David Hume argued that because “the general principles of taste are uniform（不变的）in human nature,” the value of some works of art might be essentially permanent. He observed that Homer was still admired after two thousand years. Works of this type, he believed, spoke to deep and unvarying features of human nature and could continue to exist over centuries.

    Now researchers are applying scientific methods to the study of the universality of art. For example, evolutionary psychology is being used by literary scholars to explain the long-lasting themes and plot devices in fiction. The structures of musical pieces are now open to experimental analysis as never before. Research findings seem to indicate that the creation by a great artist is as permanent an achievement as the discovery by a great scientist.

Sharks have been swimming in the ocean for millions of years. They were on Earth even before dinosaurs! At the top of the world's ocean's food chain, sharks help keep the population of other ocean animals in balance. A large drop in the number of sharks can cause serious problems for all ocean animals. Saving sharks makes sense!

Many people are afraid of sharks. But most sharks are harmless. Only a small percentage of sharks are known to attack humans. It adapt (适应) well to new habitats and eat whatever is available. However, today, sharks are in trouble. Nearly one－third of the 400 shark species are in danger of extinction, largely due to over－fishing. Each year, tens of millions of sharks are caught and killed just for their fins. The fins are used to make shark fin soup.

Humane Society International (HSI) joined with the Jane Goodall Institute's Roots and Shoots program and Beijing Zoo to protect sharks. An exhibit at the zoo, "the Price Behind the Taste—Protect Sharks. Don't Eat Shark Fins", was designed to tell people that shark finning is cruel and unnecessary. It's hoped that the activity will help put an end to the practice.

Shark fin soup is also eaten in the United States. In fact, the numbers of some shark species in US waters have dropped 90 percent in the last 30 years. To slow the fall, laws against the sale of shark fins have been passed in several states, including Hawaii, Oregon, Washington, and California.