Exercise is a way of keeping the body healthy through being active. Another name for exercise is physical fitness. Most people exercise in their spare time. Sports are some of the most popular ways to get exercise.

    The two main kinds of exercise are aerobic exercise(有氧运动)and anaerobic exercise (无氧运动).Sports such as football and basketball are great forms of exercise. {#blank#}1{#/blank#}

    Aerobic exercise is energetic movement that lasts for a certain period of time.{#blank#}2{#/blank#}The lungs and the heart work harder to bring in extra oxygen. Swimming, cycling, running and rapid walking are good examples of aerobic exercise.

    Anaerobic exercise is a powerful burst of movement followed by a period of rest. During anaerobic exercise the muscles need more energy than the body can make with its supply of oxygen. After the exercise a person feels out of breath because the muscles have worked without oxygen.{#blank#}3{#/blank#}

    Exercise affects every part of the body in positive ways. It improves balance and coordination (协调).{#blank#}4{#/blank#}Exercise strengthens the heart and increases the lungs′ ability to take in oxygen. Through exercise the bones and muscles get stronger, and the whole body becomes healthy and strong.

    {#blank#}5{#/blank#}People who exercise generally have a more positive, happy attitude.

A. This is because they combine both of these types.

B. Frequent and regular exercise helps prevent diseases.

C. Exercise also gives people a greater feeling of well-being.

D. It also improves posture, or the resting position of the body.

E. Weight lifting ,jumping, and golfing are all types of anaerobic exercise.

F. Physical exercise can contribute positively to keeping a healthy weight.

G. During aerobic exercise the body combines oxygen with sugar to get more energy.

    Radar is an electronic device that detects planes, ships, coastlines, landmarks, and even storm clouds. The name radar comes from the first letters of the words radio direction and ranging. As the human eye uses light waves to see, radar “sees” with radio waves. Without radar, planes could not land safely in bad weather and ships could not move safely in thick fog{#blank#}1{#/blank#}

    In the 1800s it was discovered that radio waves could be reflected from objects. But scientists did not make great advances in radar research until the 1930s, when the world was threatened by war{#blank#}2{#/blank#} It has been used widely in almost every conflict since then.

    Echoes make it possible for radar to work. When a beam of radio waves is sent out, it strikes on an object and returns an echo. This echo is picked up by radar and recorded on a screen similar to television screen. On the screen an observer sees a flash, or a blip, that shows the direction and distance of the object.{#blank#}3{#/blank#}

    Airport control towers use radar to guide planes in for safe landings. Almost all large ships depend on radar to prevent collisions with icebergs or other ships{#blank#}4{#/blank#}Weather forecasters “see” the size, direction, and speed of storms on radar screens. Astronomers can even use radar to measure accurately the distance to the moon. Thus, the device has generated major advancements.

    {#blank#}5{#/blank#}Huge radar antennas have been installed all over the United States. They guard us against possible enemy attacks. We have ballistic—missiles (战略导弹)warning systems that can alert us to attacks when missiles are more than 1,000 miles away. Other radar systems warn us against enemy aircraft and even spying space satellites.

A. Police track speeders in radar-equipped cars.

B. These measurements are now highly accurate.

C. The device can be used in a wide range of fields.

D. It is therefore especially valuable to shippers and travelers.

E. During World War II many countries used radar effectively.

F. Today radar is used by commercial airliners and weather forecasters.

G. Strengthening national defense is one of radar's most important functions.

    The 21st century has introduced the world to a new way of doing Business. It's now a foregone conclusion that global commerce will be as revolutionized by it as Henry Ford's rnass-production techniques were a defining characteristic of the 1900s.

    {#blank#}1{#/blank#}It allows Internet-based purchase and sales transactions involving almost anything to be safely conducted at lightning speed. Safeguards are in place to make identity cheating, charge back prevention and funds verification (核实) much more of a surety than anything the conventional means of payment in the non-cyber world can provide. E-currency may only exist in the cyber world, but that is nothing new.{#blank#}2{#/blank#} It was officially accepted by the countries of the European Union in 1999 to simplify business by abolishing exchange rates, but it began life 20 years before that by private financial institutions who saw it as an idea that had to happen.{#blank#}3{#/blank#} It is now arguably the second-most influential currency in the world.

    Experiential shopping is the next big thing.{#blank#}4{#/blank#} You order online on your phone, card or whatever, and it's delivered to you by the time you get home. Money is being already lent to people based purely on the positive rankings a person has on a website. Online paying is so difficult.{#blank#}5{#/blank#} Also, we're moving to a world where we all have one online ID. Whether it's your face, your fingerprint, your credit card or your mobile phone remains to be seen.

A. In modem England, the way people spend, earn, save and invest is being revolutionized.

B. You've got your log-ins, your password, card numbers and so on for different websites.

C. When the euro has already gone, today's e-currencies will follow.

D. By 2002, the euro had evolved from cyber-tender to hard cash.

E. Shops are like museums you can touch.

F. The euro began in the same manner.

G. The Business is e-currency.

How to Enjoy Life As a Teen

    Are high school days equal to the "best years of your life"? Maybe not, but you can learn to make the most of your high school days.

    {#blank#}1{#/blank#}Whether it's having a computer, having friends, having a good supply of food, a bed to sleep on, family that loves you, having a decent education or simply being born in this world. Be happy, and life will reward you. Remember that these are the last few years you will be able to enjoy yourself without having to worry about the responsibility of an adult, but make sure you prepare yourself for when you do become one.

    Choose your friends wisely. Unlike what many articles state, you don't have to be popular and have a gazillion friends to be happy. {#blank#}2{#/blank#}Try to have friends that like you who you are, not just because you are wearing a certain brand of shoes or something like that. These are people who shop at the same store as you; not someone who will sympathize with you when your dog dies.

    {#blank#}3{#/blank#}Participating in clubs, activities, and sports increases your chances of meeting new friends. While you only need 4 or 5 close friends, that doesn't mean you shouldn't try to meet new people. Participating gives you something to do instead of sitting bored at home and wallowing in self-pity.

    You can pursue interests you enjoy. Video games, for example, are good if you're the type who can get into that kind of thing. Use your "hobby time" either to gain practical skills for college apps, job resumes, and scholarships or get into something else in the creative field like painting or dance.{#blank#}4{#/blank#}

    Work at a job you can enjoy. Working is a great way to gain experience and to meet other people. When you do get out of college, interviewing companies will look at your prior work experience. {#blank#}5{#/blank#}If you can't find work, especially in this hard economic time, volunteer or make your own job.

A. Remember that the point of life is for you to enjoy it.

B. In fact, many of the "friends" you have when you are popular are not true friends.

C. Learn to appreciate small things.

D. Be sociable.

E. This will look great on your resume.

F. This is the time to start developing passions.

G. You should also find a hobby that is meaningful or practical.

Little Habits Make a Big Difference

Everything around us is changing at amazing speed, it seems ̶ but some things will always remain the same.{#blank#}1{#/blank#} Some of our daily habits have the power to always give us happiness and lead us toward success. Here are some little habits that can make a big difference:

    {#blank#}2{#/blank#}

    Many studies have linked early rising with success. An early morning wake-up carries benefits including better planning and anticipation（预料）of problems, and more time to do the things that make you happy.

    Happiness comes to those who are curious.

    {#blank#}3{#/blank#} As long as you live, there will always be something to learn, and as long as you follow your heart and your passions, you won't miss out on learning.

    Believe in yourself and all that your are.

    {#blank#}4{#/blank#} Confidence is the key to success ̶ the thing that lets you look at the past without regret, stay grounded in the present, and prepare for the future without fear.

A day well spent gets you a good night sleep.

    Enough sleep makes you feel healthier and happier, and it's more than lifting up your mood or removing exhaustion. Adequate sleep is a key part of your health and inner happiness. {#blank#}5{#/blank#}

    It doesn't take a huge effort to make a significant change in your life－using one or two tiny habits may be all you need. Get started today and you'll soon be experiencing the rewards.

A. That's why habits are so powerful.

B. The ground work of all happiness is good health.

C. Early to rise makes you healthy, wealthy, and wise.

D. The habit of respect means treating everyone with kindness.

E. Nothing will ever make you happier than having faith in yourself.

F. When you rest better, you can live better and achieve more happiness.

G. There is no stage in life when we can't be learning something valuable.

Understanding special education

    What will appear in your mind when you think about special education? You might picture children with disabilities spending the day in a different classroom, separated from most of the kids of their age. {#blank#}1{#/blank#}. But as the field of special education has moved forward, it much has changed.

    Special education today is still focused on helping children with disabilities learn. {#blank#}2{#/blank#}. In fact, federal law requires that students who receive special education services be taught alongside their non-disabled peers as much as possible. For example, some students with reading disorder may spend most of the day in a general education classroom. They may spend just an hour or two in a resource room working with a specialist on reading and other skills.

    The changes are also reflected in other aspects. {#blank#}3{#/blank#}. It's tailored(量体裁衣) to meet each student's needs. Special education refers to a range of services that can be provided in different ways and in different settings. If your child qualifies for special education, he'll receive individualized teaching resources. The specialists who work with your child will focus on his strengths as well as his challenges.

    {#blank#}4{#/blank#}. Making the curriculum accessible to students with disabilities is a lot like making buildings accessible to people in wheelchairs. School districts have a process in place to determine which students are qualified for special education. This process involves a systematic evaluation that looks at the way your child thinks. {#blank#}5{#/blank#}. If the district agrees to evaluate your child, the testing will be conducted at no cost to you.

A. "Access" is an important term in education

B. You or your child's school can request an evaluation

C. This may have been the normal situation in the past

D. There is no "one size fits all" approach to special education

E. To clear the learning barriers is the purpose of special education

F. But this no longer means placing kids in a special classroom all day long

G. The qualification for special education is assessed by local school districts