When it comes to the benefit of volunteering, a lot of people think it s all about the warm feeling after helping someone{#blank#}1{#/blank#} As is known, charity work requires a wide variety of people to do a wide variety of things for everything to work. It means that there are some surprising benefits for volunteers. For example, volunteering:

    Teaches you new skills.

    From helping making websites to teaching immigrant kids your native language, or to arranging events for charity, volunteering can really be almost anything. It means that when you get involved in charity work, a lot of the time you will face challenges{#blank#}2{#/blank#}

    Can teach you what truly matters.

    It's a great way to find new perspectives(角度) on life. When you've been at it for a while, you just might find yourself re-evaluating your advantages{#blank#}3{#/blank#} One of my friends went from wanting to be a lawyer to discovering a true passion for teaching

    {#blank#}4{#/blank#}

    Maybe it is not surprising, but what might surprise you is how genuine these friends are. Some of my long-term friends are people I've met through volunteering. I'm not that kind of guy that makes friends purely for connections, but sometimes it's very convenient to have a broad network.

    Summed up in one line: volunteering helps you grow{#blank#}5{#/blank#} You meet a wide variety of people who don't have a lot in common with. You learn to get along with people involved in many different walks in life. You learn to know what you are to do. So if you've ever considered volunteering, what are you waiting for?

A. You might even decide on a completely new path to take in life.

B. Helps you make new friends

C. As it turns out, that's far from the only benefit.

D. Volunteering helps you look outside yourself and your problems.

E. Through overcoming the challenges, you learn completely new skills.

F. Not only as a person, but it helps you develop your skill as well.

G. Can help improve social skills

    The Nazca Lines are a series of large ancient geoglyphs (地画) in the Nazca Desert, in southern Peru. It is ranging from geometric patterns to drawings of different animals and stylized human-like forms. The ancient lines can only be truly taken in from high in the air, leaving generations puzzled as to how these precise works could have been completed long before the documented invention of human flight.

    The Lines were first spotted when commercial airlines began flying across the Peruvian desert in the 1920,s. Who built them and what was their purpose? Are they roads, star pointers，maybe even a gigantic map? If the people who lived here 2,000 years ago had only a simple technology, how did they manage to construct such precise figures? Did they have a plan? These markings are like a vast puzzle.

    The Nazca Lines are the most outstanding group of geoglyphs in the world. There are also huge geoglyphs in Egypt, Malta，United States (Mississippi and California), Chile，Holivia and in other countries. But the Nazca geoglyphs, because of their numbers， characteristics, dimensions and cultural continuity as they were made and remade throughout a certain history period, form the most impressive archeological (考古学的) group.

    The Nazca plain is unique for its ability to preserve the markings upon it, due to the combination of the climate (one of the driest on Earth, with only twenty minutes of rainfall per year) and the flat, stony ground which minimizes the effect of the wind at ground level. With no dust or sand to cover the plain and little rain or wind to erode (腐蚀) it, lines drawn here tend to stay drawn. These factors, combined with the existence of lighter-colored subsoil beneath the desert surface, provide a vast writing pad that is suited to the artist who wants to leave his mark eternal.

    The past two decades have seen astronomers' catalogue of planets expand over two hundred times, as new techniques and better telescopes have found more than 2,000 of them orbiting stars other than the sun. But in the solar system itself, the list of planets has actually shrunk, Pluto（冥王星）having been downgraded from that status in 2006. The number of the sun's planetary companions has thus fallen from nine to eight.

    Now, a pair of astronomers from the California Institute of Technology think they have evidence that will restore the sun's record to its previous value. Their analysis of objects orbiting in the Kuiper Belt（柯伊伯带）, a ring of frozen asteroids（小行星）that circle beyond the orbit of Neptune (and of which Pluto is now regarded as the largest member), suggests to them that something about ten times as massive as Earth has changed those orbits. If you knew where to look, this planet-sized object would be visible through a suitable telescope. And Konstanin Batygin and Michael Brown believe they do know.

As they write in the Astronomical journal, they have analyzed the orbits of Kuiper Belt objects and found six that behave in a peculiar way. As the diagram shows, the points of closest approach of these objects to the sun, known as their perihelia（近日点）, almost coincide. Moreover, these perihelia all lie near the ecliptic（黄道）—the plane of Earth's orbit and also, approximately, that of the other planets—while the objects' orbits are all angled at 30° below the ecliptic. The chance of all this being a coincidence, the two researchers estimate, is about seven in 100,000. If it is not a coincidence, it suggests the six objects have been guided into their orbits by the gravitational intervention of something much larger.

    A computer analysis Dr Batygin and Dr Brown performed suggests this something is a planet weighing 5-15 times as much as Earth, whose perihelion is on the opposite side of the sun from the cluster, and which thus orbits mainly on the other side of the solar system from the objects its orbit has affected. This planet's perihelion would be 200 times farther from the sun than Earth's, and the far end of its orbit might be as much as six times that distance away. This gives a search zone, and Dr Batygin and Dr Brown are using Subaru, a Japanese telescope, to perform that search.

    Given other demands on Subaru's time, it might take five years for this search to find (or not find) the hypothetical planet. But looking at some existing data from. The Widefield Infrared Survey Explore, a satellite, might also show it, if it is there to be seen.

    Ironically, it was Dr Brown as much as anyone who was responsible for Pluto's downgrading, for he discovered Eris, an object almost as big as Pluto, in 2005.

    That discovery did much to damage Pluto's planetary proof. By his own admission, he was skeptical that the anomalies he and Dr Batygin have investigated actually would point to the existence of a replacement ninth planet. He is a skeptic no longer. Whether he is actually right may soon become apparent.

    It's never easy to explain exactly when a specific language began, and in the case of English we can hardly regard it as a separate language before the Anglo-Saxons came to Britain. Germanic invaders (入侵者) came and settled in Britain from the north-western coastline of continental Europe in the fifth centuries. The invaders all spoke a language that was Germanic (related to Dutch, Frisian, German and the Scandinavian languages), but we'll probably never know how different their speech was from that of their continental neighbors.

    The reason that we know so little about the language in this period is because we do not have much in the way of written records from any of the Germanic languages until several centuries later. When Old English writings began to appear in the seventh and eighth centuries there was a good deal of regional variation (变化), but not more than that found in later periods.

    The Celts already lived in Britain when the Anglo-Saxons arrived, but there are few obvious signs of their language in English today. Some scholars have suggested that the Celtic tongue might have had some influence on the grammatical development of English, particularly in some parts of the country, but this is highly speculative (猜测). The number of borrowed words that have entered Old English from this language is very small. Those that survive in modern English include “comb” (a type of valley), alongside some place names.

The Four-step Approaches to Managing Anger

    If something happens that makes you feel angry, try these following steps. {#blank#}1{#/blank#} Maybe it will help you prevent angry feelings from building up inside.

Identify the problem. Start by noticing what you're angry about and why. {#blank#}2{#/blank#} Ask yourself: What's got you angry? What's your feeling and why? You can do this either in your mind or out loud, but it needs to be clear and specific.

    Think of potential solutions. This is where you stop for a minute to give yourself time to manage your anger. It's also where you start thinking of how you might react—but without reacting yet. Ask yourself: What can you do? Think of at least three things. {#blank#}3{#/blank#} This is where you think about what is likely to result from each of the different reactions you came up with. Ask yourself: What will happen for each one of these options?

    Make a decision. This is where you take action by choosing one of the three things you could do.{#blank#}4{#/blank#} Ask yourself: What's your best choice? Once you choose your solution, then it's time to act.

    Check your progress.{#blank#}5{#/blank#} Ask yourself: How did you do? Did things work out as you expected? If not, why not? Are you satisfied with the choice you made? Taking some time to reflect on how things worked out after it's all over is a very important step. It helps you learn about yourself and it allows you to test which problem-solving approaches work best in different situations.

A. Learn to receive the fact.

B. They help you cool down when you feel like your anger might explode.

C. Put into words what's making you upset so you can act rather than react.

D. Look at the list and pick the one that is likely to be the most effective.

E. It's called a problem-solving approach.

F. After you've acted and the situation is over, spend some time thinking about how it went.

G. After that you should consider the consequences of each solution.

    While you might not realize it, the environment where you sleep can make a great difference in the actual quality of sleep that you get every night. With a few simple lifestyle changes, you can create a healthy sleep environment that helps improve your sleep quality.

    Go to bed and get up at the same time every day, even on weekends, holidays and days off. Studies show that people who do so are more rested than those who sleep irregularly (不规律地).

    Go to sleep only when you start to feel sleepy. If you don't fall asleep within about 15 minutes, get up and do something relaxing. Go back to bed when you are tired.

    Pay attention to what you eat and drink. Don't go to bed either hungry or stuffed. Your discomfort might keep you up. Avoid caffeine (咖啡因) 6 hours before you sleep. Having a cup of coffee within a few hours of bed time can keep you awake for hours when you are trying to sleep. Coffee isn't the only product containing caffeine. Avoid chocolate and tea, too. Also limit (限制) how much you drink before bed to prevent trips to the toilet at night.

    Many people turn on the TV before they go to bed. TV influences your natural sleep habits by making you stay up longer than you usually would, especially if you are watching something exciting. Instead of turning on the TV, read a book. Light reading before bed can help you fall into a deep sleep quickly.

    If you suffer from serious sleep problems, go to your doctor. Your doctor will help treat the problem or may advise you to see a sleep specialist.