Taking a math test can be pretty stressful. Even if you know the material, you can still get the problem wrong. {#blank#}1{#/blank#} Therefore you'll improve your grades, as well as your math skills.

    Write it out

    You can also check a math problem by writing everything out on paper. {#blank#}2{#/blank#} Writing out math problems reduces your chances of missing anything to the lowest possible level, which is a common cause of incorrect answers.

    {#blank#}3{#/blank#}

    Make sure your answers work by doing the opposite procedure of what your problem calls for, including the answer you got the first time around. In other words, you would use the opposite of this addition problem—subtraction (减法)—to determine whether your answer is the correct one.

    Plug in（代入）

    You may find that a variable isn't good enough or have a problem where you have to solve for a variable (变量). {#blank#}4{#/blank#} This is the only real way to assure yourself that the answer you've found is correct.

    {#blank#}5{#/blank#}

    If the result of a problem seems to make no sense, it indicates that the answer is incorrect. For example, if you get an answer in the millions and you know it should be in the thousands, you've likely misplaced a point. Go back through the work on your paper to make sure all of your formulas and calculations are correct. If everything looks okay, do the problem again and compare the result of the second try to what you've got on the first try.

A. Do the opposite.

B. Correct the answers.

C. Plug the variable in the equation (方程) to check it out.

D. Knowing how to go through your math test and checking your work can save you from handing in a test full of mistakes.

E. It also helps you to figure out everything after you have already finished the test.

F. Check for a reasonable answer

G. This helps you to know what information you have and what information you need to solve.

    To most people, noise pollution is a jet flying over their head. For one Spanish woman, it is a neighbor playing the piano. The woman has taken her neighbor to court. Now she wants to send her neighbor to prison for over seven years on the charges of psychological damage and noise pollution.

    In a country known for its noisiness, the case has raised eyebrows. Neighbors often complain  about street noise in Spain, but people seeking prison time for someone practicing the piano is unheard of. At the trial, Sonia Bosom says she has been suffering noise pollution up to now due to the practice sessions of Laia Martin, who lives below her. Martin, 27, didn't admit that she played at home that often, saying she took regular classes in other towns and mostly practiced at home on the weekends.

    On the first day of the trial, the newspaper reported that Bosom told the court she now hated pianos so much that she couldn't even stand seeing them in a film. Bosom says years of hearing Constant playing has caused her “psychological injury”. Medical reports show she has suffered from a variety of problems, including insomnia (失眠), anxiety, and panic attacks.

    She says tests by local authorities have found that the sound levels made by the piano are up to 10 decibels （分贝）higher than the limit. City authorities have asked the family several times to either stop the piano playing or soundproof (隔音) the room. The family told the court that they carried out soundproofing work twice but the complaints continued.

    The court hasn't made a final decision. A spokeswoman says the trial will end before May.

    Ammie Reddick from East Kilbride, Lanarkshire, was only 18 months old when she had the accident that had scarred(留下创伤）her for life. The curious child reached up to grab the wire of a hot kettle in the family kitchen and poured boiling water over her tiny infant frame.

    Her mother Ruby turned round and, seeing Ammie horribly burnt, called an ambulance which rushed her daughter to a nearby hospital. Twenty percent of Ammie's body had been burned and all of her burns were third-degree. There, using tissue（组织）taken from unburned areas of Ammie's body, doctors performed complex skin transplants(移植）to close her wounds and control her injuries, an operation that took about six hours. Over the next 16 years, Ammie underwent 12 more operations to repair her body.

    When she started school at Maxwelton Primary at age 4, other pupils made cruel comments or simply wouldn't play with her. "I was the only burned child in the street, the class and the school,” she recalled, “some children refused to become friends because of that.”

    Today, aged 17, Ammie can only ever remember being a burned person with scars; pain is a permanent part of her body. She still has to have two further skin transplants. Yet she is a confident, outgoing teenager who offers inspiration and hope to other young burns victims.

    She is a member of the Scottish Burned Children's Club, a charity set up last year. This month, Ammie will be joining the younger children at the Graffham Water Center in Cambridge shire for the charity's first summer camp. “ I will show them how to get rid of unkind stares from others,” she says. Ammie loves wearing fashionable sleeveless tops, and she plans to show the youngsters at the summer camp that they can too.“ I do not go to great lengths to hide my burns scars,” she says, “ Igave up wondering how other people would react years ago.”

    Today we talk about a time when half the world is waking from the dark, cold winter months. Spring! We often describe “spring” as a time of rebirth, renewal and awakening. Many trees are blossoming and early flowers are pushing through the earth. Things are coming to life!

    But the word “spring” is not just a season. It is also a verb that means something going on or coming out quickly. When you put “spring” and “life” together, you will get “spring to life”. This expression means something suddenly becomes very active or perhaps seems more alive! You may “spring to life” after hearing that a distant friend will be visiting you. Or maybe your favorite soccer team finally “sprang to life” in the second half, played well and won the match.

    Now, besides being a season and a verb the noun “spring” refers to a metal coil (线圈) that is wound tightly. When the coil unwinds, it often jumps. So, we often say a person “has a spring in his step” if he is lively and active. He might even appear to jump, or bounce a little when he walks.

    There is another way we use “spring” as a description. In the case of a “spring chicken”, “spring” means young. However, “spring chicken” is also an informal, humorous way to refer to someone who isn't young at all. So, we use this expression in the negative form, as in “no spring chicken”. For example, let's say you know an 85-year-old man who decides to run a marathon, even though he has never exercised before. You could say, “That's amazing! After all, he's no spring chicken.”

    But be careful when using this expression. It could be a little disrespectful. Let's say your boss shows you a picture of his wife, and you say, “Wow, she's no spring chicken.” That response would be disrespectful and a bad career move.

    The traditional British pub is part of the scenery of British life. At the last count, there are around 50,000 of them in the UK. The oldest – Ye Olde Fighting Cocks in St. Albans – was set up in about 793.

    Because of their abundance, the names pubs take are designed to be memorable, but more than that, they are designed to be visual. Outside any traditional pub worthy of its title, you'll find a hanging signboard with an unusual and uncommon illustration(插图) that represents the name of the business. The practice is so well established that even new pubs copy it. But why do they exist at all?

    The first British pub signs were created in the 12^th century and were simple representations of beer containers and other brewing-related equipment used to tell passersby that establishments sold beer. This was Britain in the dark ages, when education was in short supply. Since most of the population was unable to read, pub signs were used to inform would-be customers that they could find a drink inside.

    The earliest uses of pub names would reference the sign directly. People would appoint to meet at "the sign of the Eagle and Child" rather than at "the Eagle and Child".

    Today the tradition remains unchanged largely out of respect for the past, but many pub signs do have some functionality. Remote country pubs often use signboards to point the way to their doors. It's a part of British culture that's rapidly disappearing – more than 20,000 pubs have closed since 1980 – but for now there are still more than enough. You can take a moment to appreciate the history and symbolism behind a pub's sign the next time you see one.

The hardest thing about planning a big European vacation is actually narrowing down where to go—there are just so many amazing places. That's why we've put together what we think are the best cities in Europe. 

AMSTERDAM, NETHERLANDS

Amsterdam is the kind of city that you can't help but fall in love with. It's the kind of place where you dream about moving and buying an apartment that overlooks (俯瞰) a peaceful river. It's relaxing and you get a sense that the locals have an amazing quality of free life. We love simply walking around the canals and exploring the city's neighborhoods. 

BERLIN, GERMANY

Berlin is said to be "poor but charming" and we think that's a pretty good description. Actually, Berlin is becoming more expensive as its popularity grows, but it's still the top spot for Germany's artistic scene. Berlin isn't particularly pretty but it's an energetic city with cool people and cooler graffiti-covered (涂鸦) neighborhoods. 

LISBON, PORTUGAL

Lisbon is a hot destination and I doubt it will be quickly moving up in the ranks of Europe's most visited cities. Lisbon is a popular coastal city that's famous for its unique buildings and charming café culture. It's also very friendly on the wallet when compared to other Western European cities—food and lodging are both priced reasonably and attractions are about average. 

FLORENCE, ITALY

Florence may be touristy but that's no reason to ignore this birthplace of the Renaissance (文艺复兴). If you do your research, you can find plenty of excellent Italian restaurants and world-class ice cream. And, of course, the city is beautiful and home to top museums so it's a dream for art and history lovers.