Taking a math test can be pretty stressful. Even if you know the material, you can still get the problem wrong. Knowing how to go through your math test and check your work can save you from handing in a test full of mistakes that can be avoided. {#blank#}1{#/blank#}

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 or not your answer is the correct one.

Plugging in

    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.

Check for a reasonable answer

    {#blank#}5{#/blank#} 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.

How can I fight laziness?

    Lazy people will never amount to anything in life. However, laziness can be defeated once a few changes have been made in your mind.

    {#blank#}1{#/blank#}Many people lack sleep constantly, since they stay up too late and get up too early to prepare for work. These people have little motivation once they arrive home. Laziness works hand in hand with a lack of motivation and a tendency to put off things. By adjusting your sleep schedule to provide a few more hours of meaningful rest, you can fight laziness throughout the day.

    Another way to fight laziness is to change your mind from passive to active. Some people treat their lives as if they were pushed from task to task. Others take a more proactive approach, viewing each task as a challenge they must overcome alone.{#blank#}2{#/blank#}

    Some people fight laziness by removing the temptations that surround them. A television in the living room may provide entertainment, but watching too much TV often contributes to laziness. Create a reward system for yourself, just as parents do for a child to promote responsibility.{#blank#}3{#/blank#}

    {#blank#}4{#/blank#}Spouses and children may all have different energy levels, but laziness can be spread if not dealt with immediately. To fight household laziness, lead by example. Be the first to collect and wash dishes after a meal. Others in the home may eventually follow your example and perform their own task. It is difficult to practice laziness when your are surrounded by motivated people.

    {#blank#}5{#/blank#}Enough exercise and a balanced diet can help you to develop a healthy lifestyle, thus enabling you to have more energy and help lift your spirits.

A. Knowing how to fight laziness is important.

B. One way to fight laziness is to get enough sleep.

C. Laziness can also be a lasting problem at home.

D. Complete a few tasks and reward yourself with what you enjoy, such as a good dinner or a film.

E. Finally, taking exercise regularly can help you fight laziness.

F. With strong determination, you will be able to achieve your goal.

G. Laziness sets in when you no longer feel in charge of your own life.

A Wonder Plant

    Every rainy season, the mountain gorillas (大猩猩) of Central Africa migrate to the foothills and lower parts of the Virunga Mountains to feed on bamboo. For the 650 or so that remain in the wild, it's a vital food source.{#blank#}1{#/blank#}Gorillas aren't the only locals keen on bamboo. For the people near the mountains, it's a valuable raw material used for building houses and making household items. But in the past 100 years, resources have come under increasing pressure as populations have exploded and large areas of bamboo forest have been cleared to make way for farms.

    {#blank#}2{#/blank#} All over the world, the ranges of many bamboo species appear to be reducing, endangering the people and animals that depend upon them. A report published by the UN Environment Programme has revealed just how profound our ignorance of global bamboo resources is.

    Bamboo is a wonder plant. Its ecological role extends beyond providing food and habitat for animals. Bamboo tends to grow in stands made up of groups of individual plants that grow from root systems. Its extensive root systems are crucial in preventing water loss and soil erosion{#blank#}3{#/blank#}In India 25% of paper produced is made from bamboo fiber, and in Brazil, 100,000 hectares of bamboo are grown for its production. Because of its flexibility and strength, it has traditionally been used in construction. Bamboo is often the only readily available raw material for people in many developing countries.

    {#blank#}4{#/blank#} Ray Townsend, vice president of the British Bamboo Society, says, “Some plants are threatened because they can't survive in the habitat—they aren't strong enough or there aren't enough of them, perhaps. But bamboo can take care of itself-it is strong enough to survive if left alone{#blank#}5{#/blank#} When forest goes, it is transformed into something else: there isn't anywhere for forest plants such as bamboo to grow if you create a cattle grass land.

A. Sadly, this isn't a single story.

B. It is the physical disturbance that is the threat to bamboo.

C. Until now, bamboo has been viewed as a second-class plant.

D. Without it, their chances of survival would be reduced significantly.

E. Besides, bamboo's most immediate significance lies in its economic value.

F. More than a billion people rely on bamboo for either their shelter or income.

G. Despite bamboo's value in economy and ecology, its situation is all the more worrying.

    Winter is a really fun time of the year—it's great to have snowball fights and build snowmen. {#blank#}1{#/blank#} When it's cold outside and you're not prepared, you can feel uncomfortable. Lucky for you, learning how to stay safe is not difficult.

    {#blank#}2{#/blank#}Wearing thick clothes is the best way to stay warm in the cold. Depending on where you live and how cold it is, some kids may need more clothes, some less.

    Take that hat. You maybe wear a large overcoat and ready to go, but are you forgetting something?{#blank#}3{#/blank#}You'll stay much warmer with a hat than without one—tons of body heat escapes right from your head.

    Drink up. Sounds like advice for hot weather, not cold weather, right?{#blank#}4{#/blank#}When you're outside in the cold and breathing hard, your body loses a lot of water through your breath. And the best way to get that water back is to drink up!

    Take it easy. Sometimes if you're out having fun, it's easy to forget to pay attention to your body. But if your body temperature drops even 4 or 5 degrees while you're outside, it can make you feel terrible.{#blank#}5{#/blank#}And if you ever feel weak, those are signs that you have to take it easy indoors for a while.

    When trying to make a successful career, which is better: being a generalist or a specialist? Inother words, should you generalize and know a little about a lot of things?{#blank#}1{#/blank#}

    Natasha Olinger, a human resource expert, talks about the benefits of both. She said Generally speaking, the common wisdom is that it's always better to specialize and then you can demand a higher salary.

    To explain her idea, linger uses a fairly commons situation-choosing a restaurant {#blank#}2{#/blank#}

    If you go to a restaurant that only serves sushi, you can expect high quality products, and you also should expect to pay more. If you go to a place that serves sushi, tacos and pizza, the quality of the sushi may not be so great, but the prices will probably be lower. {#blank#}3{#/blank#} However, she adds that all is not perfect in the world of the specialist. If there is a drop in economy, a generalist may get more job offers.

Olinger suggests thinking about the size and type of business you would like to work for.{#blank#}4{#/blank#}

    Also, companies that are just getting started often need people who are able to perform many different tasks. For example, your job description may be that of a graphic designer, but you may also have to do some writing. Larger companies can be just the opposite. They often need specialists-experts in a given field. But perhaps the best solution is a mix of generalization and specialization. {#blank#}5{#/blank#} The top of the T would be the generalized part. The upright stem of the T would be the deeper understanding of a person's general knowledge-their expertise

A. Or should we combine these two with each other?

B. Some career planners call this a "t-shaped" career.

C. Say you want to eat a favorite Japanese meal: sushi.

D Olinger says the world of work is not all that different.

E. Small businesses often need people who can do many things.

F. Olinger also warns that the world of work is more complex than this.

G Or should you specialize and have a deep understanding of only one area.

Kids are begging parents for cell phones at younger and younger ages, leaving families with tough choices to make. It might take some time to teach kids how to use phones as tools, not toys. Here are a few ways to get the message across.

Tell them not to use phones at school. Phones can be a distraction (干扰) from learning when used in the classroom. {#blank#}1{#/blank#} In fact, 43% of teens admit that they often or sometimes use their phones as a way to avoid face-to-face communication with others.

Encourage them to contact long-distance relatives. {#blank#}2{#/blank#} They're also for keeping in touch with people who you may not get to talk to as often. If you have families who live in another city or state, ask your kids to strike up (发起谈话) a conversation.

Lead by example. Setting an example is not only about how you use your phone, but also about how much you use it. When you feel bored and expect to glance over social media, fight it by taking a short walk. {#blank#}3{#/blank#}

Advise them not to use phones at the dinner table. For many families, the only time they truly get together is breaking bread at the end of a long day. {#blank#}4{#/blank#} Asking your children to leave their phones far from the dinner table is a great way to solve the problem.

{#blank#}5{#/blank#} Sometimes, kids need a little push in order to make better choices about their phones. If they're struggling with healthy habits, put some real-world events on the calendar. Good options include going to an amusement park, working together on a craft project or signing your kids up for sports.

A. Plan other forms of entertainment.

B. Prepare a dinner together with your children.

C. Screen time before bed reduces sleep quality.

D. They can also prevent students from connecting with one another.

E. So it is wise of parents to stress the importance of parent-child time.

F. Also, instead of reading a headline, why not pull out a book to read?

G. Phones aren't just for texting the best friend who lives two blocks away.