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.

We all know that water is the source （源泉） of life on Earth. No plants, animals{#blank#}1{#/blank#}humans can live without it. A new study shows how important drinking water is for{#blank#}2{#/blank#}to live long. 

Researchers found that people who drank a lot of water every day were healthier and lived{#blank#}3{#/blank#}than those who didn't. And these people developed fewer serious{#blank#}4{#/blank#}with age. What's more, they added that adults who did not drink{#blank#}5{#/blank#}water might die at a younger age. These people were much easier to show signs （迹象） of{#blank#}6{#/blank#}old. 

The researchers{#blank#}7{#/blank#}the information of older patients who visited a hospital at least five times. Dr Natalia Dmitrieva, the lead researcher of the study, said, "The results suggest that proper （适量的）water may {#blank#}8{#/blank#}slow down aging （衰老）. People should drink more water and{#blank#}9{#/blank#}, and eat more fruit and vegetables. An adult {#blank#}10{#/blank#}to drink at least 1. 5 liters （升） of water every day. "

The Chinese knot has a long history. People {#blank#}1{#/blank#}（one）made them to record information and send messages before they started to use words. The knots were used for decoration and to express thoughts and feelings in the Tang Dynasty. They were later popular in the Ming {#blank#}2{#/blank#} Qing Dynasties. Many people started to know them. But this art wasn't {#blank#}3{#/blank#}（real）accepted by the common people {#blank#}4{#/blank#} the Qing Dynasty.

Even today, Chinese knots still hold the value of feelings when they are {#blank#}5{#/blank#}（send）as gifts. For example, lovers may give {#blank#}6{#/blank#} knot to express their love. The "double happiness knot" is given and used at wedding to show each {#blank#}7{#/blank#}（other）love and wishes for growing old together. Knots are also used when people make {#blank#}8{#/blank#}（tradition）clothes, in China like hanfu. They can play the role of buttons and now silk is widely used {#blank#}9{#/blank#}（make）these clothing knots.

Many tourists including {#blank#}10{#/blank#}（foreign）like to buy Chinese knots as presents during their trips. There are many shopping streets for people to buy Chinese knots.

Children today stay indoors most of their time. They watch TV, play computer games and in some cases( 情 况 ), even do their homework. Figures show that today's youngsters( 年 轻人 ) stay outside for just over an hour each weekday, and fewer than five hours on Saturdays and Sundays.It also shows that 58 percent of parents wish their children to play outdoors more often, and they seriously worry their children don't spend enough time playing outdoors.

In fact, playing outdoors is so important for children—not only to help them stay active and healthy, but also to communicate with friends, and make those colorful childhood( 童年) which we look back on so warm,

And because they don't go out, they don't know their own communities as well as their parents did, they don't have as many friends in the area and they don't have the same chances for fun as their parents did.

Good morning, my friends! Nice to meet you. Let me introduce my family to you. 

First,{#blank#}1{#/blank#}. I'm a middle school student in Hangzhou. My name is Jack Smith. Jack is my first name. What's my last name? It is Smith. It's my family name, too. Then,{#blank#}2{#/blank#}. Her name is Mary Smith. She is two years older than me. Her first name is Mary. And her last name is Smith, too. Her telephone number is 368 5689. Finally,{#blank#}3{#/blank#}. They are Mike and Gina. Mike is my father's brother. Gina is Mike's wife. They have a son. His name is Eric. And he is my cousin. 

Oh,{#blank#}4{#/blank#}. My grandparents, my parents and I are in the photo. I must find it. Can you help me?

What's your family like? (答案不多于15词) {#blank#}5{#/blank#}

I am a girl Look, {#blank#}1{#/blank#}is a photo of my family The man in black is my father He is a doctor He {#blank#}2{#/blank#} in a hospital He always wants to be healthy,{#blank#}3{#/blank#} he runs every day That is my mother She is a teacher She likes cooking food for {#blank#}4{#/blank#}And her eating habit(习惯) is very good For{#blank#}5{#/blank#}, she likes eggs, apples and milk in the morning. And for dinner, she likes vegetables and rice very much The boy{#blank#}6{#/blank#} yellow is my brother He wants to be a basketball player He{#blank#}7{#/blank#} basketball every afternoon My brother and I are in the {#blank#}8{#/blank#} school, but in different grades The girl is me I {#blank#}9{#/blank#} big eyes and long hair I am in a pink skirt I like eating fish and drinking orange {#blank#}10{#/blank#} I often help my mother with housework(家务活). I have a happy family.