Cars are very important in the life of the Americans. ⑴Without a car, most American people would feel that they are poor. And even if a person is poor, he doesn't really feel poor when he has a car. ⑵Henry Ford was the man who started making cars in large numbers. He probably didn't know how much cars would affect the American culture. Cars have made the United States a nation on wheels. And ⑶it has helped to make the United States what it is today.

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    Do you know Stephen Hawking? Stephen Hawking was born on 8 January, 1942 in England.When he was older,he went to Oxford University.Stephen wanted to study maths, but maths was not available(可得到的) at University of Oxford. So he studied physics instead. After three years , he went on to do research at Cambridge University.    ①   After leaving the Institute of Astronomy in 1973 , Stephen came to the Department of Applied Mathematics and Theoretical Physics.

    When he was 21 years old, he caught a serious disease.He had to“walk”in his wheelchair living his life.   ②    He continued to do his research in the field of science and he got his Ph.D. He devoted himself to his scientific research. He continued to explore the universe and travelled around the world to give lectures. In 1988, he wrote the book A Brief History of Time. Readers were pleased and surprised to find that a scientist could write about his work in a way that ordinary people could understand. The book explains how science works , tells the readers how the discoveries work and how they change the world.

    In 2002, Hawking visited China and spoke to university students in China. He told the students about his theories and thoughts on some of the greatest questions,“What is time, how did the universe begin, and what exactly are black holes?”

    Stephen Hawking died on 14 March ,2018.He was one of the greatest scientists in the world.We can learn his exploring spirit from him.

    My hobby is playing chess — one of the greatest games in the world. My mum taught me how to play when I was seven years old. {#blank#}1{#/blank#} But then, on my eighth birthday, I won for the first time. I nearly always beat her now.

    To learn the rules doesn't take long. One day is enough. But if you want to be good, you have to practice for years. {#blank#}2{#/blank#} — just a chess set and someone to play with. Chess sets can be very cheap, or quite expensive. Some people collect chess sets as a hobby, but I enjoy playing.

    {#blank#}3{#/blank#} We meet on Wednesday every week to practice. I am the best player in the club, and the captain（队长）of the school chess team. This year we won the All England Schools Championship (冠军赛).

    I'm saving up my money to buy a chess computer. They are very expensive, but also very good for practice. {#blank#}4{#/blank#} I'm sure I will be a world chess champion some day.

    Music touches our hearts and shortens (缩短) the distance between people of different countries. The super star Jay Chou has cooperated with the American NBA star Kobe Bryant to create a song named TheHeavenandEarthChallenge. That's a song written by Jay Chou whose favorite sport is basketball. It expresses the love for basketball. And it encourages young people to be more confident. Jay Chou has learned much from Kobe's sports spirit. In the song, Jay Chou does most of the singing part while Kobe plays a part of a rapper (说唱者). People can download the ring tone(铃声) of the song from the Internet. All the money from the downloads will go to Project Hope, which aims to improve the educational environment in poor areas in China.

    "I sometimes get up at three or four in the morning to surf the Intern"

    "I check my e-mail almost forty times a day."

    "I seldom spend less than three hours each time on the net."

    "spend more time in chat rooms than with my 'real-life' friends."

    Do you know any people like these? They are part of a new addiction(瘾) called Internet addiction. According to experts，Internet addicts(迷)spend at least thirty to forty hours online every week. They lose control of the time they spend on the Internet.

    For example, one college student was missing for several days. His friends were worried and 1ooked for him everywhere but couldn't find him. They called the police. The police found the student in the computer lab: he was surfing the Internet — for seven days straight.

    A study shows that about six to ten percent of Internet users become addicted. The teenager spend more time on the Internet than with friends and family. That's why some experts worry most about young people.

    Is "surfing the Internet" a hobby or all addiction for you? You may have a problem if you have one of the following symptoms(症状):

    You go out with your friends less and less.

    You can't wait to get online again.

    You've decided to spend a short time online，but then you spend several hours.

    You do not go to important family events or you do not do school projects because you like to spend hours on the Internet.

    What is the solution? Some experts suggest that people set strict limits(限制) on their time for Internet use. You have to learn to control it，or the Internet would control you.

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