How Teens Can Stay Fit

    Any type of regular, physical activity can improve your fitness and your health. Doing physical exercise is easy, but the difficult thing is that you keep moving! {#blank#}1{#/blank#}, like brushing your teeth, eating, and sleeping. It can be in gym class, joining a sports team, or working out on your own. Keep the following tips in mind:

    {#blank#}2{#/blank#}. A good mental attitude is important. Find an activity that you think is fun. You are more likely to keep with it if you choose something you like. A lot of people find it's more fun to exercise with someone else, so see if you can find a friend or family member to be active with you.

    Take it one step at a time. {#blank#}3{#/blank#}. For example, walk or ride your bike to school or to a friend's house instead of getting a ride. Get on or off the bus several blocks away and walk the rest of the way. Use the stairs instead of taking the elevator or escalator.

    Get your heart pumping(跳动). Whatever you choose, make sure it includes aerobic(有氧的) activity that makes you breathe harder and increases your heart rate. This is the best type of exercise because it increases your fitness level and makes your heart and lungs work better. {#blank#}4{#/blank#}. Examples of aerobic activities are basketball, running, or swimming.

    Don't forget to warm up with some easy exercises or stretching(拉伸) before you do any physical activity. {#blank#}5{#/blank#}. Stretching makes your muscles and joints more flexible too. It is also important to stretch out after you exercise to cool down your muscles.

A. It also burns off body fat

B. Stay positive and have fun

C. Physical exercise can help prevent diseases

D. Small changes can add up to better fitness

E. Exercise should be a regular part of your day

F. This warms your muscles up and may help protect against injury

G. Do the activity as often as possible, but don't exercise to the point of pain.

    Lindsay Renwick, the mayor of Deniliquin, a country town in New South Wales, misses the constant whir（嗡嗡声）of the rice mill whose giant fans dried the rice. The Deniliquin mill, the largest rice mill in the Southern Hemisphere (南半球), once processed enough grain to meet the needs of 20 million people globally. But six years of drought have had a destructive effect, reducing Australia's rice crop by 98 percent and leading to the mothballing of the mill last December.

    Drought affects every agriculture industry based in Australia, not just rice – from sheep farming, the country's other backbone, to the cultivation of grapes for wine, the fastest-growing crop there, with that expansion often coming at the expense of rice. The drought's effect on rice has produced the greatest impact on the rest of the world, so far. It is one factor contributing to skyrocketing prices, and many scientists believe it is among the earliest signs that a warming planet is starting to affect food production.

    Researchers are looking for solutions to global rice shortages – for example, rice that blooms earlier in the day, when it is cooler, to fight against global warming. Rice plants that happen to bloom on hot days are less likely to produce grains of rice, a difficulty that is already starting to emerge in inland areas of China and other Asian countries as temperatures begin to climb. 'there will be problems very soon unless we have new varieties of rice in place,” said Reiner Wassmann, climate change director at the International Rice Research Institute (IRRI). The recent reports on climate change carried a warning that could make the news even worse: that existing models for the effects of climate change on agriculture did not yet include newer findings that global warming could reduce rainfall and make it more variable.

    Yet the effects of climate change are not uniformly bad for rice. Rising concentrations (浓度) of carbon dioxide, the main greenhouse gas, can actually help rice – although the effect reduces or disappears if the plants face unnecessary heat, inadequate water, severe pollution or other stresses. Still, the flexibility of farmers here has persuaded some climate experts that, particularly in developed countries, the effects of climate change may be relieved, if not completely avoided. “I'm not as negative as most people,” said Will Steffen, director of the Fenner School of Environment and Society at Australian National University. “Farmers are learning how to do things differently.”

    Meanwhile, changes like the use of water to grow wine grapes instead of rice carry their own costs, as the developing world is discovering. “Rice is an essential food,” said Graeme Haley, the general manager of the town of Deniliquin. “Wine is not.”

    Do you still remember the haze (雾霾) in the winter? So many people got terribly ill during or after the haze. {#blank#}1{#/blank#}Here is advice for you to protect yourself in hazy weather.

    Spend less time outdoors. This is the most effective way for self-protection in such bad weather. With PM 2.5 increasing 103mg per cubic meter, residents will risk a 2.29% increase of death, which experts found out in 2013. If you have to get out, avoid riding bicycles. {#blank#}2{#/blank#}

    Close your windows. Experts advise residents to avoid opening windows at home if you have to, avoid the time when smog is at its densest (浓的) {#blank#}3{#/blank#} Besides, you can keep plants with broad leaves at home to absorb dusk, and use air purifiers.

    Smoke less. {#blank#}4{#/blank#} In hazy weather, smoking would be even more harmful. Smokers are advise to keep their distance from cigarettes before the weather gets better.

    {#blank#}5{#/blank#} For example, wear special masks outside to avoid breathing in PM2.5. Then take off your coat after getting indoors and keep it away from your other clean clothes. Don't forget to wash your face, rinse your mouth, and clean your nasal cavity (鼻腔) to clean the particulate matters(颗粒物) that fall on you. Last but not least, keep off stimulating foods.

A. Pay attention to other daily things.

B. Wear masks.

C. That's because haze does harm to the health of people.

D. Also avoid rush hours, when pollutants will be denser.

E. For residents who use air-conditioner, make sure your apartment has enough oxygen indoors.

F. Take more fruits and vegetables instead, which are good for lung, spleen and kidney.

G. Cigarettes could cause more particulate matters, which are included in PM 2.5.

    It's hard when a best friend isn't around—maybe because he or she moved to a different school or a different class. {#blank#}1{#/blank#} You want to have new friends, but how do you make? Maybe it seems that everybody else already has his or her friends.{#blank#}2{#/blank#} Start by looking around your classroom—think about which kids you'd like to play with at break. Look for chances to say hi to them, smile, and be friendly.{#blank#}3{#/blank#} Invite someone to play with you or say "Do you want to sit here?" in the lunchroom. When you're at break, walk over to kids you want to play with, act friendly, and say "Hi, can I play, too?" or just join in.

    If you have trouble doing this or if you're feeling shy, ask your teacher to help you make new friends. Teachers are usually pretty good at matching up friends.{#blank#}4{#/blank#} Be kind, be friendly, share, say nice things, offer to help—and pretty soon, you'll have one, or two, or even more new friends.

    {#blank#}5{#/blank#} But when you see each other, you can share something you didn't have before he or she left: You can introduce him or her to your new friends!

A.The best way to make friends is to be a friend.

B.What's right for me?

C.But remember, there's always room for more friends.

D.You might still miss that special best friends.

E.Offer to share something or offer greetings.

F.You may feel lonely at break or lunchtime.

G.Make a choice in your life.

    "Life is speeding up. {#blank#}1{#/blank#}." Picture this: You're rushing to finish your homework on the computer. Your mobile phone rings. Suddenly the computer blanks and you lose all your work. Now you have to stay up to get it done. {#blank#}2{#/blank#}.

    {#blank#}3{#/blank#}. Due to these inventions, we are often left feeling stressed and tired. Why do you think people who live far away from noisy cities often seem to be happier? Perhaps because they lead a simple life.

    One family in the UK went "back in time" to see what life was like without all the inventions we have today, The grandparents, with their daughter, and grandsons Benjamin, 10 and Thomas, 7, spent nine weeks in a house dating back to 1940. {#blank#}4{#/blank#}.

    The grandmother, Molly, said, "It was hard physically, but not mentally." She believed life was less materialistic. " {#blank#}5{#/blank#}." she said. The boys said they had less to fight over, their computer, for example. Benjamin also noticed that his grandmother had changed from being a trendy, beer —drinking granny to one who liked cooking things.

A. Are you faced with a completely different situation?

B. Hardly can you succeed in doing something in a perfect way

C. Everyone is getting unwell

D. How can you feel calm and happy?

E. Inventions have speeded up our lives so much

F. They had no microwave, computer or mobile phones

G. The more things you have, the more difficult life becomes

Home libraries can be a dynamic expression of the owner's personality. Creating a home library is a fun way to display your interests while establishing a special space for reading.

While there's no right or wrong way to design a library, the questions can be puzzling, especially to someone with hundreds or thousands of books. How do I organize?{#blank#}1{#/blank#} We'll discuss how to build a home library that works for you.

What room should I use for my home library?{#blank#}2{#/blank#} While reading in a room with big windows and lots of light is refreshing, storing books in natural light is harmful to them. Basements heavy with humidity (湿气) will cause mold (霉菌) and attract insects.{#blank#}3{#/blank#}

When you started using the public library, you probably learned about Melvil Dewey and his system for ordering libraries. The Dewey Decimal Classification System has ten broad categories for organizing books, including philosophy, religion and the arts.{#blank#}4{#/blank#} For example, when you want a book on modern art, you head to the 700th block. Larger libraries, such as those at universities, tend to use the Library of Congress Classification System, because it offers a more specific array of subjects for categorization, adding subjects such as medicine and law for a total of 21categories.

{#blank#}5{#/blank#} Your home library may or may not be as large as your local public library, but a good system of organization will still help you find the book you want quickly. You could take a page from Dewey and the Library of Congress and sort books by subject matter. Sections for subjects such as history, technology or fiction might make their retrieval (检索) easier. This system will also allow you to highlight a particular passion, such as an extensive collection of World War II history,

A. How do I get everything to fit?

B. Each category is assigned a number.

C. Almost everybody wants a home library.

D. A good system of organization is the key.

E. In addition, basements are likely to be flooded.

F. Almost any room will do with a few exceptions.

G. The size of a home library depends on how much space you can spare.