Sleep and dreams have interested people for centuries. Scientists are learning more about sleep, but they still know very little about why we dream.

    {#blank#}1{#/blank#} First, we have most of our dreams during REM (rapid eye movement) sleep. At this time, the brain is very active. Second, everyone dreams, even if we can't remember doing so when we awake. {#blank#}2{#/blank#} While we are asleep, it works more slowly and sometimes puts our thoughts and memories together in strange ways.

{#blank#}3{#/blank#} Some believe that our dreams are relevant to thoughts and feelings that we experience while we are awake. Many dreams researchers think that a dream about death, for example, is really about an important life change. {#blank#}4{#/blank#} A dream about teeth—especially broken or loose ones-may suggest stress or fear. Dreams in which you are flying often represent freedom or escape.

   Researchers think people in our dreams can tell us something about ourselves. If the person in the dream was yelling, for example, maybe you are angry. {#blank#}5{#/blank#}

There is still a lot about dreaming that we do not understand. By learning more about our dreams, we may learn more about ourselves.

    A. Dreams may be more important than sleep.

    B. Scientists do not know for certain why we dream.

    C. If he or she was scared then maybe you are terrified of something.

    D. Modern research can tell us some important things about dreams.

    E. There are three things you should pay attention to have a sweet dream.

    F. Finally, a part of our brain helps us to understand daily experience we have.

    G. Dreams about telephones are thought to be about giving or receiving messages.

    {#blank#}1{#/blank#} If you are growing tomatoes in your backyard for sale you are producing for the market. You might sell some to your neighbor and some to the local manager of the supermarket. But in either case, you are producing for the market. {#blank#}2{#/blank#} If people stop buying tomatoes, you will stop producing them.

    If you take care of a sick person to earn money, you are producing for the market. If your father is a steel worker or a truck driver or a doctor or a grocer, he is producing goods or service for the market.

    {#blank#}3{#/blank#} You may spend money in stores, supermarkets, gas stations and restaurants. Still you are buying from the market. When the local grocer hires you to drive the delivery truck, he is buying your labor in the labor market.

    {#blank#}4{#/blank#} But for each person or business that is making and selling something, it is very concrete(具体的). If nobody buys your tomatoes, it won't be long before you get the message. {#blank#}5{#/blank#} It is telling you that you are using energies and resources in doing something the market doesn't want you to do.

    As is known to us all, everyone can make mistakes. But don't worry about it. The following is what we should do when we make mistakes.

●Just admit (承认) it. Don't think that our mistakes are caused by others. {#blank#}1{#/blank#} Don't blame other people, and don't cheat ourselves, either.

●{#blank#}2{#/blank#} In order to stop the problem from getting worse, we should act quickly to solve it. If we don't act and deal with the problem quickly, it'll only make us feel more stressed. Also it is necessary to make a plan of action and correct the mistake according to it. {#blank#}3{#/blank#}

●{#blank#}4{#/blank#} Those who have made the most mistakes can get an A, for they are the ones who have learned the most. The more we learn from our mistakes, the cleverer we are.

●Think about what we can learn from our mistakes. What caused us to make the mistake? {#blank#}5{#/blank#}When we act with a method to get a good result, do it that way next time. If we don't, we should stop, think about it, change it and try again.

A. Solve it at once.

B. So be away from stress.

C. Don't be afraid of failure.

D. So decide quickly and act.

E. Realize that making mistakes is the best way to learn.

F. How can we avoid making the same mistake in the future?

G. Be brave and face the fact that we have made the mistakes.

    A new report says plastics are responsible for $13 billion in damage to the oceans and the undersea environment. The findings were announced recently at a United Nations conference．{#blank#}1{#/blank#}.

    Plastic thrown away carelessly makes its way into rivers and other waterways.{#blank#}2{#/blank#}. After a while, it collects in the sea. And plastic never goes away. Plastic is not biodegradable—destroyed by bacteria or natural processes. Instead, it just breaks up into smaller pieces over time. The oceans contain a lot of chemicals and other pollutants(污染物).{#blank#}3{#/blank#}.That means harmful material may get into our food supply.

    {#blank#}4{#/blank#}. Human beings cause pollution and they can take steps to stop it. They can use fewer single use product containers and throw plastics away correctly. Plastic recycling programs also works—where old bottles and other plastics are collected, broken down and used to make new products. We could reuse bottles in our households many times if we wish to, rather than end it after the first use. We could, when we get rid of that plastic, recycle it and reuse it, which replaces the need for raw materials.

    The report also calls on companies to improve methods for using plastics.{#blank#}5{#/blank#}. And it calls for information about the way plastic is thrown out or removed from use. By putting a new value on plastic, industry has a special reason to clean up the environment.

    But all of the companies must join to deal with the problem.

A. Then, fish may eat the plastics.

B. But people can make a big difference.

C. Plastics should be gathered together and reused.

D. It is convenient to use plastic bags in everyday life.

E. It asks for them to better measure and control plastic use.

F. The plastic eventually reaches coastal areas and ocean waters.

G. The report tells about harm to sea life and what might be done to improve the situation.

    Four simple ways to stay positive. Trying to stay positive, both in good times and bad, is a great way to improve your quality of life. Try these four methods on a daily basis.

    Don't think a lot about negativity.

    Of course, staying positive 24 hours a day, seven days a week is a bit difficult. Letting things get to you is normal, and it's actually healthy to cry or express frustrations once in a while.

    It's when those negative moments control your life that your emotional balance is at risk. {#blank#}1{#/blank#} However, don't give that sadness another second in your day.

    {#blank#}2{#/blank#}What you put into your body directly affects how you feel on the outside. Fill yourself with good, healthy foods like fruits and vegetables and limit snacking. Exercise is equally of great importance. Take a few days out of your week for at least a half an hour of activity, and try to stick to a routine. {#blank#}3{#/blank#}

    Be kind to others.

    {#blank#}4{#/blank#} Making someone's day a bit brighter not only puts a smile on his or her face, but also yours as well. Remember to smile and treat each person with pity and respect. Good deeds are contagious （传染的）, and your positive attitude may spread among others.

    Take it one day at a time.

    Being positive isn't an instant thing. It's a steady effort that we follow every hour of every day. {#blank#}5{#/blank#} Instead, focus on living in the moment and doing what you can to make each moment better.

A. Eat healthy and stay fit.

B. Take your lunch breaks outside.

C. Don't worry about what the future may bring.

D. Gratefulness helps you appreciate life in bad times.

E. Good feelings come from acts of kindness and selflessness.

F. Take a few minutes to feel sad and accept what happened.

G. Even going outside for a walk and enjoying the sunshine improves your mood.

    Helen Keller once wrote, "The unselfish effort to bring cheer to others will be the beginning of a happier life for ourselves."{#blank#}1{#/blank#} The UN has set December 5 as International Volunteer Day to give recognition to these people.

    Nineteen-year-old Andrew Makhoul was a communications major at the University of Pennsylvania. It was coming up to spring break, but unlike his classmates, Makhoul wasn't planning on spending the break relaxing. {#blank#}2{#/blank#}

    He traveled to Guatemala. He went to an orphanage(孤儿院)in one of the most violent and poor parts of Guatemala city. {#blank#}3{#/blank#} Although he didn't speak much Spanish, he found communication wasn't a problem: "You communicated with love." And what he gave out, he got back: "You could see love when you looked in their eyes."

    Makhoul's first time as a volunteer only lasted a week, but by the end of that week, he knew he'd be back in the future.

    {#blank#}4{#/blank#}The UN highlighted the case of Palestinian women who are survivors of breast cancer. As part of the UN's Aid and Hope Programme for Patient Care, the women have been volunteering their time to create low-cost breast prosthetics(假体)to be distributed to women for free, among whom Shahd El-Swerki is a brilliant example. {#blank#}5{#/blank#}By the end of her time there, she admired these women who are "not only survivors but also volunteers".

    About 2,400 years ago, Greek philosopher Aristotle said, "The essence(本质)of life is to serve others and do good." Volunteers all around the world are making these words come true, each and every day.

A. These words certainly prove true for the millions of volunteers all over the world

B. Here, we tell two volunteering stories from around the globe.

C. He decided to spend his time doing something useful for people.

D. Volunteers want to do their best to make the world warmer and more beautiful.

E. She worked with the women as part of the programme.

F. Sometimes, volunteers themselves live with huge challenges

G. It depends upon volunteers to stay open.