根据短文内容回答问题

Up in the Sky

    Take a trip up a hill on a windy day. What is flying high in the sky? It isn't a bird or a plane. It is a kite!

    Kids and adults like flying kites. Long ago, the first kites were made by Chinese people. Then, people around the world began flying kites.

    One story tells a man's hat got lifted off by wind. He had fun chasing his hat, so he did it again! His hat became the first kite. Other stories tell that people liked watching leaves on windy days. They tied leaves to strings and watched them fly.

    Long ago, kites became important in keeping China protected. A man might be lifted up by a kite while he spied(监视) on an enemy. He could use the kite to fly high like a plane. He could also fight from the air!

    Kites come in many shapes, sizes, and styles. They are usually made of cloth or paper. A kite might be shaped like a bird, a fish,  or just a box. Kites are also painted with colors.

    You can use a kite to catch fish. First you tie a fishing line to a kite. Then you put bait(鱼饵) on the line. You watch the kite with hopes as it flies over the water. When you pull the kite down, you might find a fish on your line! Some people think this is more fun than using a fishing pole(杆).

    Many countries have special days to honor kites. People make, sell and fly many types of kites. There are several kite festivals in China. The Beijing International Kite Festival is usually held in April every year. People spend all days flying kites. You might see famous fighter kites. People fly these kites quite fast and try to cut other flyer's lines.

    There is much to learn about kites. From long ago in China until now, kites have had many uses. They have been used for spying, fighting, and fishing. But the best way to use a kite is to fly it high for fun!

    John: I'm 15 years old and I love football. I also like reading, especially(尤其是) stories about people from other countries. I don't enjoy singing or playing computers. I think that rock music is terrible.

    Ann: Hi, I'm Ann. I'm 16 and I like dancing and computers. I also like rock music. I hate hiking and I'm not interested in classical music. I don't enjoy reading too much.

    Steve: I'm 14 years old and I love skiing. Other favorite hobbies are reading and singing. I don't like hiking. I think that rock music is too noisy and I think that football is boring.

    Peter: I'm from Australia. I'm 15 and I am fond of singing. I sing a lot, and when I'm not singing, I listen to rock music or use my computer. I don't like football and I think that classical music is terrible. I hate dancing!

    Sarah：My name is Sarah and I'm 14 years old. My interests are reading novels, playing football and singing songs. I think that rock music is terrible, and I don't like dancing. I don't enjoy computers, either.

    Joe：Hi, I'm Joe. I really like computers. I surf the Internet all the time and I like playing computer games. I don't enjoy football and I hate hiking. Rock music is OK, and so is skiing.

    Are you trying to live a healthy life? The following tips may sound strange, but they can really help you.

    Exercise when you are tired

    After a long and tiring day of study, an offer to exercise might not sound like a good idea, but it should. In fact, physical activities can provide you with the missing energy. Research shows that exercising for just 30 minutes can make you feel good!

    Write by hand to help the brain be active

    Although writing something using a computer is faster, it is much better to remember the whole thing by writing it down by hand. When you read a handwritten text, naturally it's easier for your brains to remember the information.

    Spare more time for yourself

    By sparing the time for yourself and just being alone for a while, you can have a chance to think and get to know yourself better. And you won't behave impulsively (易冲动地).

    Drink hot drinks on a hot day

    What cools more on a hot summer morning, cold water or hot water? A study shows that the hot water does make people feel cooler. When you are drinking something hot, the body will feel the change in temperature and increase the perspiration (流汗), which helps you cool down!

    Eleven countries are building a great wall of trees across Africa. It is called the Great Green Wall. The aim is to bring life to the dry lands and help to fight the bad environment.

    The wall is 8, 000 kilometers long and 15 kilometers wide. It covers from Senegal in the west to Djibouti in the east, on the south of the Sahara Desert (撒哈拉沙漠). So far, Senegal has made the best progress by planting about 11,000,000 trees.

    Many years ago, there were few trees in that area and the winds used to be very strong. It was harmful to the fields. Also, there was little rain, so few plants could grow and many people went hungry. Since the tree planting project started, the trees have provided food for the local people and increased the wetness (湿度) of the air. Little by little, there appeared green fields for people to grow plant.

    The project which began in 2007 is supposed to cost a total of 8, 000, 000, 000 dollars. Many countries are trying their best to help to continue the planting. So we will be able to see the whole green wall across Africa in the near future!

A .Christmas Day

    It is the biggest and the best-loved holiday in the United States。The Christmas tree is very popular during this time．

B .Halloween

    This holiday comes on October 31．Children make all kinds of masks(面具)and go from ho use to house to play the game called “Trick or treat".

C .New Year's Day

    It is a legal holiday in the United States．Most people have a day off from work．They say “Happy New Year to you and your family” to each other to express their hope for the happiness in the new year．

D .Valentine's Day

    Valentine's Day is a day for lovers and one of the loveliest holidays in the United States．It comes on February l4th．

E .Lincoln's Birthday

    The holiday is celebrated to memorize one of America's most admired presidents．Lincoln．It is on February l2th．

F .Thanksgiving Day

    The holiday is on the fourth Thursday of November．On this day Americans usually have Thanksgiving dinner with their family．Turkey is one kind of the traditional foods．

G .Memorial Day

    Americans celebrate this holiday on the last Monday in May so that all can enjoy a three-day weekend．It is a day to memorize those people who have lost their lives for their country．

H．Independence Day

    Independence Day is a holiday throughout the United States．It is America'-s most important holiday．