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Population Change

    Why is the world's population growing？The answer is not what you might think. The reason for the explosion is not that people have been reproducing like rabbits, but that people have stopped dropping dead like flies. In 1900,people died at the average age of 30.By 2000 the average age was 65.But while increasing health was a typical feature of the 20^th century, declining birth rate could be a defining one of the 21^st.

     Statistics show that the average number of births per woman has fallen from 4.9 in the early 1960s to 2.5 nowadays. Furthermore, around 50% of the world's population live in regions where the figure is now below the replacement level(i.e.2.1 births per woman)and almost all developed nations are experiencing sub-replacement birth rate. You might think that developing nations would make up the loss(especially since80% of the world's people now live in such nations),but you'd be wrong, Declining birth rate is a major problem in many developing regions too, which might cause catastrophic global shortages of work force within a few decades.

     A great decline in young work force is likely to occur in China, for instance. What does it imply? First, China needs to undergo rapid economic development before a population decline hits the country. Second, if other factors such as technology remain constant, economic growth and material expectations will fall well below recent standards and this could invite trouble.

     Russia is another country with population problems that could break its economic promise. Since 1992 the number of people dying has been bigger than that of those being born by a massive 50%,Indeed official figures suggest the country has shrunk by 5% since 1993 and people in Russia live a shorter life now than those in 1961.Why is this occurring? Nobody is quite sure, but poor diet an above all long-time alcoholism have much to do with it. If current trends don't bend. Russia's population will be about the size of Yemen's by the year 2050.

     In the north of India, the population is booming due to high birth rates, but in the south, where most economic development is taking place, birth rate is falling rapidly. In a further twist, birth rate is highest in poorly educated rural areas and lowest in highly educated urban areas. In total,25% of India's working-age population has no education. In 2030,a sixth of the country's potential work force could be totally uneducated.

    One solution is obviously to import foreign workers via immigration. As for the USA, it is almost unique among developed nations in having a population that is expected to grow by 20% from 2010-2030,Moreover,the USA has a track record of successfully accepting immigrants. As a result it's likely to see a rise in the size of its working-age population and to witness strong economic growth over the longer term.

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    Do you want to learn a new language?{#blank#}1{#/blank#}Do you need it for a practical reason,such as your job or your studies?Or perhaps you're interested in the literature,films or music of a different country.{#blank#}2{#/blank#}

    Most people learn a language best by using a variety of methods.However,traditional classes are an ideal start for many people.They provide an environment where you can practice under the guidance of someone who's good at the language.We all lead busy lives and learning a language takes time.{#blank#}3{#/blank#}As a result,you should try to develop a routine.It doesn't matter if you haven't got a long time.Becoming fluent in a language will take years,but learning to get by takes a lot less.

    Many people start learning a language and soon give up.“I'm too old,” they say.Yes,children do learn languages more quickly than adults.{#blank#}4{#/blank#}And learning is good for the health of your brain,too.I've also heard people worry about the mistakes they make when learning.Well,relax and laugh about your mistakes.I'm sure you're much less likely to make them again.

    {#blank#}5{#/blank#}But with some work and devotion,you'll make progress.And you'll be amazed by the positive reaction of some people when you say just a few words in their own language.Good luck!

A.Learning a new language is never easy.

B.The very first thing to think about is why.

C.You must inspire your kids to learn it well.

D.You will have more success if you study regularly.

E.Maybe you know the language will help your work a lot.

F.Sometimes you have to quit it because of too much work.

G.But research has shown that you can learn a language at any age.

    Aside from the health benefits of laughter (which are numerous and significant), having a sense of humor about life's difficulties can provide a way to bond with others, look at things in a different way, normalize your experience, and keep things from appearing too overwhelming or scary. Properly developed, a good sense of humor can keep people and relationships strong.

    Studies show that having a smile on your face can make you feel better, and can lead you to actually feeling happier (rather than just looking happier). Even if the smile is fake, the benefits you will experience are real! Also, a fake smile leads readily to a genuine one. If you are able to put a smile on your face, the laughter will come more easily, and the stress will melt more easily.

    If your situation seems ridiculously frustrating, recognize what can develop into humor in just how ridiculously frustrating and annoying it is. In your imagination, take the situation to an extreme that becomes even more ridiculous until you find yourself amused. For example, when you're waiting in a long line at the store, you can imagine that hours pass, then days, visualizing yourself accepting visits from loved ones from your new home in this ultra-long line, holding your children's birthday parties in aisle seven so you can be there to enjoy them...you get the picture.

    Besides, find a friend with whom you can laugh also works! You can each share your frustrations, and laugh about them in the process. Even when your friend isn't there, you can feel less stressed by thinking about the retelling that will come later.

    You can have a “most annoying boss” game with your friends, or try to count how many times the same potentially frustrating event happens in a day.(“I was cut off in traffic 7 times today—I'm almost up to 10!”) This works well for predictable or repetitive annoying situations that you can't control; you can begin to value them in their own special way instead of letting them upset you.

    One of the factors that drive the popularity of shows like Modern Family or movies like the classic Ferris Bueller's Day Off, is that they take somewhat universal situations that many people find frustrating and push them a little further, pointing out the silliness of it all.

What's more, you can try joining Funny Clubs.Years ago, when Oprah had a show rather than a network, she did a part on Laughter Yoga that interested me, and I researched a club on my own, finding it to be a terrific place to enjoy a good laugh. Whether you mean business or laugh at the silliness of it all, taking part in the exercises of laughter yoga with other humor-participants can be a very effective way to get back in the practice of getting some more laughter into your day.

    Cross-country skiing can be enjoyed by a wide range of students, from the youngest kindergartners to those secondary students. It is really a fun activity, providing students a gentle workout outside in winter. While having fun, students can gain physical and mental benefits.

    The physical benefits of cross-country skiing are well-known. If we look at Olympic cross-country skiers, we can see the positive effects on the body that result from training for cross-country skiing.

    The average best female cross-country skiers carry 11 percent body fat, and best male skiers carry 5 percent. These percentages are well below the average people who are considered to be athletic—17 percent for females and 10 percent for males. Burning a high number of calories while skiing helps to keep skiers slim in a healthy and attractive way.

    Cross-country skiing is also an efficient way to exercise a large number of muscles at once. The upper body gets much more of workout because skiers use ski poles as a means of propulsion (推进), the force that drives skiers forward. Of course, the leg muscles also do their fair share. People who use cross-country skiing as a workout over several weeks will discover that the muscles of their whole body increase in strength.

    Cross-country skiing on a regular basis has a tremendous effect on a person's cardiovascular (心血管的) system. In addition to gaining strength in the muscles of the upper and lower body, people who use cross-country skiing as a workout method over several weeks will also discover that their heart is stronger. A strong heart pumps more efficiently, sending out more blood to the muscles with each contraction (收缩). Through weeks of skiing, people often discover that their resting heart rate has decreased. Highly trained Olympic cross-country skiers have resting heart rates between 28 and 40 beats per minute. Compare that to the resting heart rate of the average person, which is 60 to 80 beats per minute!

    The benefits of cross-country skiing extend beyond overall general health. A lot of evidence exists showing that regular physical activities increase the release of mood-lifting endorphins  (内啡肽) in the body. After fun skiing lessons, students will be full of energy; they will be relaxed and in a better mood than when they started class. Students will leave class with a sense of accomplishment, knowing that they have developed new skills in a fun activity.

Cross-country skiing is a great way to exercise the whole body. Now more and more students are taking part in this exercise outside during the winter months. They are enjoying it and benefiting from it!

    If you are already making the time to exercise, it is good indeed! With such busy lives, it can be hard to try and find the time to work out. {#blank#}1{#/blank#} Working out in the morning provides additional benefits beyond being physically fit.

    Your productivity is improved. Exercising makes you more awake and ready to handle whatever is ahead of you for the day. {#blank#}2{#/blank#}

    Your metabolism (新陈代谢) gets a head start. {#blank#}3{#/blank#} If you work out in the mornings, then you will be getting the calorie (卡路里) burning benefits for the whole day, not in your sleep.

    {#blank#}4{#/blank#} Studies found that people who woke up early for exercise slept better than those who exercised in the evening. Exercise energizes you, so it is more difficult to relax and have a peaceful sleep when you are very excited.

    {#blank#}5{#/blank#} If you work out bright and early in the morning, you will be more likely to stick to healthy food choices throughout the day. Who would want to ruin their good workout by eating junk food? You will want to continue to focus on positive choices.

There are a lot of benefits to working out, especially in the mornings. Set your alarm clock an hour early and push yourself to work out! You will feel energized all day long.

A. You will stick to your diet.

B. You prefer healthy food to fast food.

C. Your quality of sleep improves.

D. There is no reason you should exercise in the morning.

E. After you exercise, you continue to burn calories throughout the day.

F. You can keep your head clear for 4-10 hours after exercise.

G. If you are planning to do exercise regularly, or you're doing it now, then listen up!