I'm sure you look into the mirror several times a day. In fact, we can't live without mirrors. Today mirrors are everywhere A from your room to your father's car. They are helpful in many ways. The mirror has a long history. But do you know who invented it and when it was invented?

    People started using mirrors a long time ago. The first mirrors used were natural mirrors such as reflection in water. The first man-made mirrors were made out of the rock. Later, people used different metals such as bronze（青铜） to make mirrors. Throughout history, different types of mirrors have been used in many different cultures at the same time.

    The first glass mirror was invented by a German named Justus Von Liebig in 1835.He used a silvering（镀银） technique to produce the glass mirror. Today aluminum is the main metal used for mirror.

    Today, mirrors come in various shapes and sizes. They are used for different reasons. We usually start our days by looking into the mirror in the bathroom. We also use them often during the day to keep ourselves tidy.

    Mirrors are important for cars too. If cars don't have mirrors, it's impossible to drive. This is because drivers can't see other cars coming. Of course, that would lead to many car accidents. It is said that breaking a mirror causes seven years of bad luck. So, look after your mirrors well.

    The first chocolate was eaten by people in South America hundreds of years ago. In those days, the people did not really eat chocolate. They used the cocoa bean（可可豆） to make a chocolate drink and they enjoyed it very much. Many years later, the cocoa bean was brought to other countries and people came to love the taste of chocolate.

    In 1824, John Cadbury opened a small shop in Britain. One of the things he sold was chocolate drink. In 1831, he opened a factory to make chocolate drink. He wanted to encourage people to drink chocolate instead of other drinks. A few years later, a man called Joseph Fry found a way to make chocolate bars（条状巧克力）, and so far the first time people had the chance to eat chocolate instead of only drinking it. But at that time chocolate was very expensive and only the rich people could buy it. Later, more and more chocolate bars were produced and sold, and it became cheaper.

    However, at first only plain chocolate（a kind of chocolate without milk and with very little sugar）was produced. Milk chocolate came later and this was made by adding milk to the chocolate. The first milk chocolate bar was made in Cadbury's factory in 1897.The most famous chocolate, Cadbury's Milk Bar, was made in 1905.It has been the most popular chocolate in Britain and around the world for over 100 years. The Cadbury factory is still in Britain and the chocolate produced there is eaten all over the world. Every year, thousands of visitors visit the factory in order to see how chocolate is made.

    Some students are talking about the inventions.

    Lucy: The telephone was invented by Alexander Graham Bell. He was born in 1847. In 1875, Mr. Bell learnt how to send （音乐的）notes through an （仪器）similar to a telephone. Finally he invented the telephone in 1876.Today the telephone is used around the world.

    Jin Long: The abacus is an （古老的，古代的） invention, but we still use it today. It was invented a few （世纪） ago. Though China is a （发展） country now. I am proud of being a Chinese.

    Tom: I think the invention of basketball is the best. Because I like basketball and I think it is an （活泼的, 积极的） sport. When we play basketball, we should （分开） into two groups. Players on the same team must work together to get the ball into the other team's （篮筐）. At the same time, they need to stop the competing team from getting the ball into their （自己的） basket. It was invented by a （加拿大人） called James Naismith.

    Usually, students are not encouraged to run or jump around in the hallways. However, students in a British grammar school really enjoy （run） on the tiles（瓷砖） of the hallways and their teachers even encourage them to do that.

    Why? It is because the hallways were （build） with special tiles. When students jump on the tiles, electricity will be generated（产生）. After one year, the electricity is generated from the tiles can be enough for 853 mobile phones to get full power again, or for an electric car to drive seven （mile）. It's amazing, isn't it?

    The tiles are really fascinating invention. Students can not only play in the hallways, but help power the lights in their school hallways and other devices（设备） in their classrooms. Besides, this is a good way to teach students to be （create）. They will be inspired to be scientists, inventors and engineers the future to find clean energy for all humans.

    The inventor of the magic tiles is Laurence Kemball-Cook. He was once a student in this school. Now, he is the CEO of （he） own company. The hallway tiles are not Laurence's only invention. He has also invented a special dance floor, which can be （easy） used at music festivals. It allows dancers to charge their mobile phones while they are dancing on the dance floor.

提示：试验experiment；蒸汽机 steam engine

I think the train is one of the greatest inventions in history.   

People used electric streetcars to travel in cities. On weekends, they rode the streetcars to parks. Young people liked roller coasters（过山车）.

The first movie lasted only one minute. Soon, however, movies got longer. In the 1920s, movie theaters sold millions of tickets each week. In 1927, movies finally had sound.

Many people stayed at home when they were free. They listened to another new invention-the radio.

People in cities worked indoors on weekdays, so they wanted to be outdoors on weekends. Bicycling became a popular activity.

Now with more time, money and inventions, people have many during their spare time.

A.      B.   C.    D.