Tea is an important part of Chinese tradition. Tea has very close relationship to Chinese culture.

    It is said that Chinese tea was discovered by King Shen Nong. People say that he lived 5，000 years ago. One summer day, while he was visiting a faraway part of his country, he felt very thirsty. The servants began to make water hot enough for him to drink. Dried leaves from a near plant fell into the water. The king drank some, and found it could make him feel less tired. Also as a scientist, Shen Nong was interested in the new drink. And so, tea was created in 2737 BC.

    Drinking tea has many advantages. It makes people feel less tired, clears heat inside the human body and helps people become slimmer. As you add a cup of tea to your daily life, please check the following helpful advice.

    Drink it hot. Tea oxidizes(氧化)quickly, so it is suggested that you drink it hot.

    Do not drink too much strong tea. It will probably be harmful to your stomach and make you feel sick if you make the tea too strong.

    The best time to drink tea is between meals. It may not make you have a strong wish to eat when your stomach is empty, or cause stomachache when your stomach is full.

    Do not drink with medicine. It may change the medical result. You can drink tea two hours after you take medicine.

    Green tea is the best choice for office workers. Why? Because green tea helps stop the bad result of the computer.

    When migrants（移民） arrive in the US, they face a world that can be confusing in many ways. They need to learn to live in a different environment. Some laws and rules are written down. They can learn about them before they arrive. But there are lots of "unwritten rules," too. Unwritten rules are behaviors that no one talks about, but that most people understand.

    Here is a list of five important issues any new arrival to the U.S. should know about.

    Be "on time." In some cultures, time is not a big issue. If you tell your friend to meet you at 2 p.m. and you arrive at 2:45 p.m., there is no problem. In the U.S., people feel that being on time is a sign of respect. If you are late by more than a few minutes, people will think you do not care. They will feel you are wasting their time. They will take your lateness as an insult.

    Be sure you always "tip." In many countries, after you eat at a restaurant, you only pay the amount shown on the bill. But, in the U.S., people who work in restaurants and bars often earn a low hourly wage. So, they try to provide excellent service, hoping the customer will give them a "tip," meaning a little extra. People in the U.S. tip between 15 percent and 20 percent of the bill. You also give tips to taxi drivers, hotel employees and the people who cut your hair.

    Be careful what you say. Any place you go there will be some things that are proper to talk about and some things that are not. Supposing that people have the same beliefs as you is a bad idea. In the past decade, people in the U.S. have become more open about discussing strong political and religious views. But it is still best to listen to people share their opinions first and then decide about sharing your own. Also, there are several topics you should avoid asking questions about: how much money a person makes and if they are married. But if a person offers this information, then there is no problem.

    Be polite for the situation. People in the U.S. define being polite in very special ways. For example, waiting in line involves a strong set of rules in this country. You must wait until the people in front of you have done what they are waiting to do. When going through a door, the person behind you expects you to hold the door for them. Also, it is common for people you do not know to say hello to you when passing you. But this does not always mean they are inviting you to stop and talk for a long time. Many times the person is just being friendly. If you don't say hello back to them they may think you are being unfriendly.

    Different countries have different customs. When you are in different countries, you should follow their customs.

    In China, it's impolite to talk when eating dinner. And you're not supposed to start eating first if there are older people at the table.

Very often people who travel to the United States forget to tip(付小费）. It is usual to tip waiters, taxi drivers and porters who help carry your bags. Waiters expect to get a 15% tip on the cost of your meal. Taxi drivers expect about the same amount.

    In England, make sure to stand in line even if there are only two of you. It's important to respect lines there. It's a good idea to talk about the weather. It's a favorite subject of conversation with the British.

    In Spain, it's a good idea to have a light meal in the afternoon if someone invites you for dinner. People have dinner very late, and restaurants are not generally open until after 9:00 pm.

    In Saudi Arabia（沙特阿拉伯）， men kiss one another on the cheek(脸颊）. Your host may welcome you with a kiss on both cheeks. It is polite for you to do the same.

    In Japan, people usually give personal or business cards to each other when they meet for the first time. When a person gives you a card, don't put it into your pocket as soon as you get it. The person expects you to read it.

    Don't forget to be careful of your body language to express something in conversations. A kind of body language that is acceptable in one culture may be impolite in another.

    Welcome to Isle Royale National Park! It is a US national park in the state of Michigan.

    Isle Royale is surrounded by the deep blue waters of Lake Superior, the largest freshwater lake on Earth by area. No cars are permitted in Isle Roy ale. There are no real roads on the island. The only way to get to the park is by boat or sea plane. A boat trip to Isle Royale takes three to five hours. Isle Royale is the largest of the islands within the national park. It is over 72 kilometers long.

    The whole national park covers a total area of 2, 320 square kilometers, with 540 square kilometers above water. Isle Royale became a national park in 1940. But once they arrive, most visitors stay a white. The average stay for visitors in Isle Royale National Park is 3.5 days. Isle Royale offers hiking, camping, boating and even scuba diving.

    Visitors to Isle Royale can see a lot of mouse and wolves in winter. The national park is closed from November l through April 15, due to extreme weather conditions. But for the other months of the year, Isle Royale offers green forests and clear blue waters.

    All around the world, people drink tea. But tea does not mean the same thing to everyone. In different countries people have very different ideas about drinking tea.

    In China, for example, tea is always served when people get together. The Chinese drink it at any time of the day at homes or in teahouses. They prefer(更喜欢) their tea plain, with nothing else in it.

    Tea is also important in Japan. The Japanese have a special way of serving(招待) tea called a tea ceremony(仪式) .It is very old and full of meaning. Everything must be done in a special way in the ceremony. There is even a special room for it in Japanese homes.

    Another tea-drinking country is England. In England, the late afternoon is "teatime".

    Almost everyone has a cup of tea then. The English usually make tea in a teapot and drink it with cream and sugar. They also eat cakes, cookies and little sandwiches at teatime.

    In the United States people drink tea mostly for breakfast or after meals. Americans usually use tea bags to make their tea. Tea bags are faster and easier than making tea in teapots. In summer, many Americans drink "iced tea". Sometimes they drink iced tea from cans, like soda.