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.

Until the beginning of July, there has been no rain in northern Italy for over 100 days. Add to that the high temperatures, and the locals get very dry conditions. This is the most serious dry spell（干旱期）for that area in the past 70 years. Because of this situation, the country's longest river, the Po, is drying up!

This is bad news for several different reasons. The fresh water of the Po provides drinking water for northern Italy. Besides, farmers in this area need the water of the Po to keep their crops growing. What's more, the flowing river water is used to create about half of the hydroelectric power（水力发电）for Italy. Its drying up means that more natural gas（天然气） will be used, which is bad for the environment.

There have been some interesting discoveries from this lack of rain, however. Between Florence and Milan, a long ship sunk （沉没）in 1943 appeared because of the low water levels of the river. Now many tourists and locals come to see this ship. A German tank has also appeared out of water near Mantua. At other places along the river, people can even walk on the sandy river bed. Although this may be interesting, people in Italy and around the world are hoping for the return of rain to refill the Po!

Hi, I'm a middle school student. I'm Judy. In my class there are thirty-eight students. How do they go to school every day? Seventeen of them take the bus because they live far from the school. Six students walk. They think walking is good exercise. Fifteen students ride their bikes to school because they like riding bikes very much and their homes are not far from the school. No one goes to school by car. How do you go to school? Haha, I'm one of the fifteen.

A lot of primary schools in China are doing something to improve naptime conditions (午休条件)for students.

Recently, Dongxing Experimental Primary School in Quanzhou, Fujian, is popular on the Internet. Why? Because the school uses adjustable(可调整的) sleep desks to help students have a better nap. With a simple turn of a knob(旋钮), desks become comfortable beds. In this way, students can rest in a proper way.

Longteng Primary School in Zhengzhou, Henan, is another example. At school, there are some unused classrooms. These classrooms are now naptime rooms with beds and pillows.

For classroom usage, Tianqi Primary School in Wuhan, Hubei, is planning to make unused indoor sports fields and activity rooms future nap spaces. Teachers in Tianqi said, "Students are excited to hear this news. They are looking forward to having a comfortable place to rest."

In the town of Chashan, Liling, Hunan, Meixia Wanquan Primary School plays an important role for a great number of left-behind children who live too far away to return home for a nap. An organization gave them 130 folding beds to make sure every child could have a proper nap.

The new way of napping at school is not only comfortable but also good for health. Medical experts warn, "If students take naps with their face down, it will increase(增加)their eye pressure and finally lead to some eye problems. The lying-down way of napping addresses these worries, and protects the children's health."

Hello, I'm Bob. I'm 12 years old. I am at school now. I want to say something about myself. 

Playing volleyball is my hobby. I like it very much. I always play volleyball with my friends after school. It's relaxing for me. I have five volleyballs. They are under my desk. And I like to watch volleyball games on TV. 

I have eggs, milk and some fruit for breakfast. For lunch, I have noodles and some salad(沙拉). For dinner, I like chicken and some vegetables. I don't eat ice cream. It's not healthy. My favourite food is fruit and vegetables. I think they are good for our health. 

I'm healthy because I like to play sports and eat healthy food. What about you? Can you tell me about your hobby and eating habits?

注意： （1）内容必须包含要点中的所有信息；（2）可适当增加细节，以使行文连贯；（3）文中不得透露个人信息；（4）词数80左右（短文首句已给出，不计入总词数）。

How to live well on our own As middle school students，we really need to know the importance of living well on our own.