English is the first language of several countries. However, it has many differences. British, American, and South African English are all spoken differently. In many English language courses, the British and American differences are taught. One is not more correct than the other, but there are important differences between the two.

    Probably the biggest difference between American and British English is the vocabulary. Different words and expressions are used to talk about the same thing. For example, in the United States, people throw their garbage into the trash can. In England, people throw their rubbish into the dustbin. In Britain, people take a lift to the fifth floor. In America, people take an elevator.

    American and British grammar can be also different. For example, speakers of British English will ask "What did you do at the weekend?", but Americans usually say "on the weekend." In the United States people usually say "I've gotten a new car.", but in the UK they will say "I've just got a new car."

    The pronunciation in American and British English is also different, even when the spelling is the same. The word "tomato"—pronounced "to-mah-to" in British English—is a classic example of this.

    Vocabulary, grammar, and pronunciation are three ways English is different in different parts of the world. Learning all these is not easy, so English learners should just know that they are always there.

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    Mayme Clayton collected books， magazines and letters written by African Americans. Her son， Avery Clayton， thought her collection was important. Unlike most books， these were rare and hard to find. They were written by writers who helped shape African American culture.

    One book in the collection was written by Phillis Wheatley. Wheatley was a slave who wrote poetry. She was the first African American to publish a book. Wheatley herself signed (签名) the book in the Claytons' collection. No one else owns a copy signed by Phillis Wheatley.

    By the time she passed away at age 83， Mrs. Clayton had more than 30，000 books by or about black people. Her collection also includes papers about slaves， photographs， movies， sheet music， and personal letters by black leaders and artists. It is one of the biggest personal collections of African American history and culture in the United States.

    Avery Clayton's dream was to create a museum for his mother's treasures.  Scholars say that Mrs. Clayton's collection is very important. Without her work， part of African American heritage (遗产) would have been lost. “We didn't know these things existed，” says Sara Hadron of California's Huntington Library.

    The collections new home is likely to be in Culver City， California. Part of Avery Clayton's dream is to share the cultural riches his mother collected with others. He especially wants children to have a chance to see the collection. “ At present African American culture is being explained by pop culture，” he says， “ It's important to offer a more complete picture.”

    I am walking through the winter park where the trees stand cold and bare (光秃秃的). The yellow leaves have fallen to the ground. Now, a group of women gather at the sides of a path. In the cold winter, they're moving their arms and legs to a rhythm (节奏). They are, of course, the dancing aunties.

    It seems that if you go to any public space around China, you're likely to see these dancing aunties. When I first came to China, it was one of the first things that annoyed me. That's because in Britain dancing in public is not a cultural habit. You won't see any age group swinging their arms and tapping their feet in a park. Usually, they just take a walk for exercise.

    Now and again the dancing aunties have hit the headlines (头条新闻). Some people find them annoying. But others respect their right to dance in public. Most of them are middle-aged. They finally have some free time to do whatever they like. There is no more work, and their kids have left.

    All in all, I like seeing these women enjoying themselves. They remind us of the importance of exercise as we get older. Besides, most of them have raised the whole families. Now it is their time to have fun and enjoy some peace.

    ①Jenny lives in New York. Her father has a shop there and her mother is a doctor. Jenny is ②seven years old and begins to go to school this autumn. ③It is a little far from the school and her father drives a car to take her to school every day. So she is ④never late for class and her teachers like her. It is Monday today. Miss Smith is ⑤teaching the students to count(数)from one to ten. Jenny is studying hard, and soon she can count them. Miss Smith is happy and asks, "How many people are there in your family, Jenny?" Jenny stands up and says, "Four, Miss Smith." "Who are they?" "My grandparents, my mother and my father." "Oh?" Miss Smith is surprised(惊讶的) and says, "There are five people in your family." "But now I am not at home. I'm at school." Jenny says.

    Most teens need more than 9 hours of sleep each night. But about 1 in 4 teens has trouble in sleeping. Lack of sleep can affect everything from our feelings to how well we focus on tasks like studying. It can also influence sports performance, increase our chances of getting sick, and may lead to weight gain in some people.

    How can we get the sleep we need? Here are some ideas:

    Be active during the day. Get at least 60 minutes of exercise a day. Physical activity can decrease stress and help people feel more relaxed. Just don't work too close to bedtime because exercise can wake you up before it slows you down.

    Say goodnight to electronics. Experts suggest using the bedroom for sleep only. At least shut everything down an hour or more before lights out.

    Keep a sleep routine. Going to bed at the same time every night helps the body expect sleep. Creating a bedtime routine can improve this relaxation effect. Reading, listening to music, spending time with a pet, writing a diary or doing anything else can relax you.

    Expect a good night's sleep. Instead of worrying that you won't sleep, remind yourself that you can. Say "Tonight, I will sleep well." several times during the day. It can also help to practise breathing exercises or gentle exercises before bed.

    Everyone has a sleepless night once in a while. But if you regularly have trouble in sleeping and you think it's affecting your mood or performance, talk to your doctor.