Three kinds of bears live in the United States. They are the black bear, the brown bear, and the polar bear.

    Black Bears

    Black bears are the most common of the three. They live in forests in many different parts of the country. Even though they are known as black bears, they are not always black. Sometimes they are brown or tan (黄褐色的) , and a few are even white. Black bears are usually about five or six feet long, and they are the smallest of the three kinds of bears.

    Brown Bears

    Brown bears are found in a few western states and in Alaska. They live in forests as well as in open areas called the tundra (冻土地带). Brown bears are usually light or dark brown and can grow to be very large. In fact, some are eight feet long!

    Polar Bears

    Polar bears can be found in Alaska. It is in a cold area near the North Pole called the Arctic and there are no trees there. Polar bears are white, and they are the largest of the three kinds of ears. They are a little longer and usually heavier than the brown bear.

    Other Interesting Things

    Bears eat different things. Black and brown bears eat fish and other kinds of meat, roots, and berries. Polar bears eat fish, other meat, seaweed, and grass. All three types of bears eat as much food as they can find just before winter. Then during the cold months, they sleep in caves or hollowed-out trees called "dens". They keep them warm. Winter is when the female bears have their babies. All three types of bears have between one and four cubs (幼兽). The cubs are born while the mother bear sleeps!

    All people are afraid of bears. However, bears are actually shy. Most bears try to stay away from people, but still, bears can be dangerous at times.

    Beautysleep is a real thing, researches have shown that people who have enough sleeplook more attractive (有魅力的) to others.

    A few badnights are enough to make a person look especially "more ugly", theirsleep experiments show.

    Theresearchers asked 25 university students to join in their sleep experiment.They were asked to get a good night's sleep for two nights.

    A weeklater, they were asked to sleep for only four hour every night for two nightsin a row. The researchers took make—up free (素颜) photos of the volunteers afterboth the good and the bad sleep.

    Next, theyasked 122 strangers to have a look at the photos and judge (评价) them on attractiveness, health,and sleepiness, as well as asking them: "How much would you like to makefriends with this person in the picture?"

    Thestrangers were good at judging whether the person they were looking at wastired, and if he was sleepy, his attractiveness score would be low.

    Thestrangers also said they wouldn't want tosocialize with the tiredstudents. The researchers say this is natural for people. An unhealthy-lookingface makes people run away. In other words, people don't want to hang aroundwith people who might be ill.

    Dr Brewer,an expert at the University of Liverpool said: "Judgment of attractivenessis often unconscious (无意识的), but we all do it, and we are able to judge on even somethingsmall like whether someone looks tired or unhealthy. This study is a goodreminder of how important sleep is to us."

Do you ever find yourself getting really unhappy for almost no reason? Or suddenly feeling down without knowing why? {#blank#}1{#/blank#}

An important cause for mood (情绪) changes is biology. When puberty (青春期) begins, the body starts producing hormones (荷尔蒙). These hormones cause physical changes in the body. {#blank#}2{#/blank#}

Here are some things you can do that might make those bad moods a bit easier to deal with.

{#blank#}3{#/blank#} Although not every teen experiences mood changes to the some degree, they are common.

Talk to people you trust. Friends can help each other by realizing that they are not alone in their feelings. Talking to parents is important, too. Parents can share their own experiences dealing with bad moods. {#blank#}4{#/blank#} And a doctor can help to answer questions about development.

Get enough sleep. Though it can be hard to find enough time, getting enough rest is very important. {#blank#}5{#/blank#}

Create. Taking part in some kinds of activities like building something out of wood or starting an art of music piece. Writing can help you organize and express your thoughts and feelings. Get your thoughts on paper. Do the same thing with paint, music or other art forms. Put your feelings into your art work.

This is a big tree. I can see a girl in 1 . She looks very happy. She 2 a student. 3 name is Kate Green. Kate is her 4 name. She is 5 American girl. She is 6 a yellow dress. It is very nice. The dog near the tree is 7 . The boy next to her is her big brother, Jim. Jim is 15 years old. His favorite color is blue. He is in a blue T- shirt. Kate and Jim 8 a happy family. They are very friendly and often 9 their friends. 10 they make many new friends at school.

Hip-hop dancing（街舞）is popular with many young people today. They like it because they can invent their own moves. They use this dance to show their love for life. It also shows that they feel good about life, that they just want to be themselves and enjoy life, and that they are not afraid of problems. 

Hip-hop dancing has a history of more than 30 years. It first began in the 1980s in the USA. In early times, it was seen in New York and Los Angeles. At that time, many young black people often danced to the music in the streets. They used their legs, arms, heads and even shoulders to dance. Many young people still use most of these moves today. 

Hip-hop dancing became popular all over the world because of the 1983 movie Flashdance. Some people performed Hip-hop dancing in the movie. People enjoyed their performance. They began to dance like them. Then it became popular. There are two kinds of Hip-hop dancing: new school and old school. More and more young people are learning Hip-hop dancing. People believe that it is a good way to exercise their bodies, and that it is good for their health .

Mary: You look upset, Linda. {#blank#}1{#/blank#}

 Linda: I found my sister looking through my things just now. {#blank#}2{#/blank#}

 Mary: No wonder(难怪) you are unhappy. {#blank#}3{#/blank#}

 Linda: Yes, but I'm still angry with her. What should I do?

 Mary: Well, I think you should have a good talk with her and then you can be friends again. Although she's wrong, {#blank#}4{#/blank#}

 Linda: You' re right. {#blank#}5{#/blank#}

 Mary: You are welcome. Hope things work out.