Since the beginning of human evolution, men have migrated（迁移）across continents in search of food, shelter, safety, and comfortable weather. People still move for these reasons, but new reasons for human migration are arising, such as job relocation(重新安置) and overpopulation.

    Three million migrants are moving from poor countries to wealthier ones each year, and increasingly, their destination is a neighboring country in developing parts of the world. People are moving within the developing world for the same reasons as they migrate to wealthier nations. People from poor countries are going to less poor countries, fleeing wars and conflicts. They are also responding to population pressures because some countries are densely populated, and they often have high population growth. Those people need to go somewhere else.

    There are three main reasons why people move. The basic categories and percentages are as follows, according to the Current Population Surveys (CPS):

    Family-related reasons account for 26.3%, including changes in marital（婚姻的） status, establishing a household and other family reasons; work-related reasons 16.2%, including job transfer, retirement, and other job-related reasons; housing-related reasons 51.6%, including new and better houses, better neighborhood, cheaper housing and other housing reasons; the remaining 5.9% of other reasons are attending college, the change of climate and health reasons.

    Americans have been migrating south and west for decades in search of better job opportunities and warmer climates. They have also been moving to places a little far from cities, in search of bigger yards and houses, lower crime rates and better schools. In 1950, nearly a fifth of the population lived in the nation's 20 largest cities. In 2006, it was about one in ten. That's why many American people say, “Big Cities Shrink as People Move South, West.”

    Between March 2005 and March 2007, 73.4 million Americans moved. Fifty-six percent of these moves were within the same country. Twenty percent were between counties but in the same state. Nineteen percent were moves to a different state. Some families even went abroad.

Title: People on the {#blank#}1{#/blank#}

    Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did do. So start off to travel around the world and to experience a lot.

    Enjoy much freedom.

    You will enjoy a much greater sense of freedom when no one is able to tell you what to do{#blank#}1{#/blank#}You decide where you want to go,what you want to do and how long you want to stay.

    Taste delicious food.

    {#blank#}2{#/blank#}Do you like eating Chinese,Thai or Indian food?You will enjoy the food even more when you eat it from the place it originates（起源）.For foodies（吃货）,delicious food in different places on the journey is what attracts them most.

    Meet new people.

    You will have the chance to meet new people when you travel.Some are interesting,some boring,and some totally crazy.{#blank#}3{#/blank#}Chances are that it will be worth listening to.Perhaps you will meet someone you can make friends with and get a life-long friendship.

    Appreciate beautiful nature.

    Instead of looking out your office window to see a hundred skyscrapers staring back at you,you will get the chance to see the world in all its natural beauty.{#blank#}4{#/blank#}You can walk throw the jungles of the Amazon.You can see most scenery with your own eyes instead of looking at a still image in a book.

    {#blank#}5{#/blank#}You might already be book-smart.But add street smart to your life and then there's no stopping you.Travelling teaches you many of life's lessons.You will gain pearls（珍殊）of wisdom along your journey,which will surely enables you to lead a smarter life.

A.You are the boss.

B.Live a colorful life.

C.Become street-smart.

D.Everyone has a story to tell.

E.You can see the deserts of Africa.

F.You will discover how simple life can be.

G.You will taste food from all corners of the world.

                           How to Make Friends

    Having friends may well keep you healthier and help you deal with difficulties better. It is not very hard to make friends. Continue reading to find out how to make friends.

    {#blank#}1{#/blank#} There are many ways to do this—talking about the weather (“At least it's not raining like last week!”), asking for help or saying words of praise (“I love your shoes.”).

    Introduce yourself at the end of the conversation. It can be as simple as saying “Oh, by the way, my name is ...” {#blank#}2{#/blank#} Remember his or her name!

    Join a sports team. As long as you enjoy the sport, you don't have to be really good at playing a sport in order to make friends with others.{#blank#}3{#/blank#} If you play the guitar or sing, try joining a band.

    Be a good listener.{#blank#}4{#/blank#} Ask questions about their interests, and just take the time to learn more about them.

    Encourage your friend. A very good friend encourages their friend.{#blank#}5{#/blank#} Never make fun or laugh at your friend in front of others. If someone is making fun of them, a good friend will come to save their friend.

A. Start a conversation.

B. Find out common interests.

C. But a sports team isn't the only way.

D. The key to being a good friend is the ability to keep secrets.

E. They will remain with them in both good as well as bad times.

F. Once you introduce yourself, the other person will do the same.

G. Listen carefully to what people say, and remember important information about them.

    Why Is Recycling Important?

    When you throw things away, you might be very glad to do it. Unfortunately, that's not the end of the story. The things we throw away have to go somewhere－usually they go off to be buried underground in a landfill (垃圾填埋) or burnt in an incinerator (焚化炉). Landfills can be terribly polluting. They look awful, they smell terrible, they take up space that could be used for better things, and they sometimes create harmful soil and water pollution that can kill fish in our rivers and seas.

    One of the worst things about landfills is that they're wasting a huge amount of useful material. It takes a lot of energy and a lot of resources to make things, and when we throw those things in a landfill, at the end of their lives, we're also saying goodbye to all the energy and resources instead of burying it in landfills. That certainly has advantages: it reduces the amount of waste that has to be buried and we can get useful energy from it. But it can also produce harmful air pollution, and burning almost anything adds to the problem of global warming and climate change.

    The trouble is, we're all in the habit of throwing things away. In the early part of 20^th century, people used materials much more wisely－especially in World War Ⅱ, but in recent decades we've become a throwaway society. We tend to buy new things instead of getting old ones repaired. A lot of men use single-use razors (剃须刀), for example, instead of buying reusable ones, while a lot of women wear single-use stockings. Partly this is to do with the great convenience of throwaway items. It's also because they're cheap. But wasteful period in our history is coming to an end.

    We're finally starting to realize that our lifestyle is creating problems for future generations. Earth is soon going to be running on empty if we carry on as we are. Americans have a much richer life than almost anyone else on Earth. What happens when people in developing countries such as India and China decide they want to live the same way as us? According to the environmentalists, we'd need two Earths to satisfy all their needs.

    Tests can be worrying even for the most prepared students. When some students take tests, their minds don't work as well as usual. They may experience something called test anxiety (焦虑), which can have a negative influence on their performance. Well, the following tips can help you pass your next test more easily and achieve more success!

    Get Enough Sleep

    6 hours of sleep or less can slow your mind and thus has negative effects on your performance on tests, even if you spend those missed hours of sleep studying. So, it's very important for you to get a good night of sleep before your big day.

    Study Smarter

    How do you study 'smarter'? Make a list of the things you need to learn in order of importance. That way, if you don't have enough time, you can still hit the items at the top of the list. Make a list of all the work you have to do, judge how much time each item will take, and compare that with the number of hours you have available; this will tell you whether you can read carefully or just skim, how much time you can spend checking papers, and tell you other ways to pace yourself so you can get everything done. If your time is still limited, it's important to learn to let go of being perfect.

    Visualize (想象) Success

    Before you fall asleep each night, it is a great way to visualize yourself taking the tests and doing wonderfully. Detailed visualizations can help you feel like you're really experiencing something，and visualizing yourself doing well is a way to 'practice' success in a way that can help you perform better and feel confident. Visualizations can also help you to remember the facts.

    Stay Calm

    Anxiety can harm your memory, so it's important to stay calm before and during tests. While that's easier said than done, there are several techniques that can help you calm down quickly whenever you feel nervous. For example, breathing exercise has been shown by research to reduce test anxiety, and can be very effective in helping you relax: just take deep breaths and let the anxiety come out.

    How to deal with your test anxiety

    If you said you were suffering from "burnout" in the early 1970s, you might have raised some eyebrows.

    At the time, the term was informally to describe the side effects that heavy drug users experienced.

    However, in 1974, a German-American psychologist Herbert Freudenberger found the volunteers at his clinic were struggling, too: their work was tough, and many were lacking in motivation. Freudenberger defined this condition as a state of extreme tiredness caused by constant overwork－and borrowed the term "burnout" to describe it.

    Late last month, the World Health Organization (WHO) announced that the problem will be recognized as a syndrome (综合征) "resulting from workplace stress that has not been successfully managed."

    Feeling the burn so how can you tell if you're almost burned out?

    "A lot of the signs and symptoms of pre-burnout would be very similar to depression," says Siobhan Murray, a psychotherapist. She suggests looking out for bad habits, such as increased alcohol consumption and relying on sugar to get you through the day. Also watch out for feelings of tiredness that won't go away or not having the energy to exercise or go for a walk. As soon as you begin to feel this way, Murray advises going to see your doctor. "Depression and pre-burnout are very similar. But it is still classified as an occupational phenomenon which is still best tackled by making lifestyle changes."

    And how do you know if you're really on the edge of burnout? "Stress is really important, and anxiety is what motivates us to do well," says Murray. "It's when we're continually exposed to stress and anxiety that it starts to turn into burnout."

    You're pre-burnout: What's next?

    "Sometimes they feel the need to be too perfect so they're having to work very hard to cover up that they're not quite as good as everyone thinks." Another therapist Walker says.

    However, sometimes the work environment is the problem. According to a 2018 study of 7,500 US workers, burnout comes from unfair treatment at work, an unmanageable workload and not knowing what a person's role should involve. Workers were also stressed out by a lack of support from their manager and punreasonable time pressure.

    Whatever the cause of your burnout, Murray's top tip is to be kind to yourself.

    In Murray's experience, a key driver of burnout is today's culture of wanting it all. Often it's just not possible to have a healthy social life and complete a big project at the same time. She says it's vital to prioritize and not expect too much of yourself; when others seem like the perfect boss, parent and friend all at the same time, they're probably misleading us.

    If you feel that you might be close to joining the burnout club, take a step back, figure out what's going wrong－and let yourself off the hook.