Computers are good tools. The Internet is also good.{#blank#}1{#/blank#}They can't stop. Doctors say this is a new sickness. They call this sickness Internet Addiction Disorder (IAD).

    {#blank#}2{#/blank#}They spend hours chatting to their friends or playing online games. Many people with IAD spend more time on the Internet than with family or friends.{#blank#}3{#/blank#}

    Do you have IAD? Think about these questions: How many hours a day are you online? Is it a lot or a little? When you are not online, are you thinking about playing a computer game or checking your messages?{#blank#}4{#/blank#}Do you get angry when you can't play a game?

    {#blank#}5{#/blank#}Dr. Ivan Goldberg and Dr. Kimberly S.Young have some ideas. First, ask yourself “Why am I online a lot?” Then try to take a break. For example, use the computer or play games twice a week, not every day. In this way, you can have a good social life with other friends.

A. When you are online, do you forget the time?

B. If you have IAD, what can you do?

C. But some people spend too much time online.

D. We can learn much from the internet.

E. Some people with IAD even give up their jobs!

F. Spending too much time online is bad for our health.

G. People with IAD are online a lot.

    English people are well known for plenty of tea that they drink. Per person in the UK consumes (消费) around 1.9 kg of tea every year. Tea is drunk by all sections (阶层) of society.

    But tea is not native to Britain. Most of the tea is grown in India and China. Tea first arrived in London in the 1600s. At this time, British ships were exploring the world and came across the drink in China. It was not long before green tea was available to buy. However, this was only available to the rich.

    At the beginning of the 1700s, the amount of tea arriving in Britain increased slowly. Black tea arrived at this time. At first people drank this tea exactly as it was in China. They soon discovered that it mixed really well with a little milk and sugar, giving the drink a special British characteristic.

    In the 1800s tea was still a product enjoyed only by people with money. At this time they began to have "afternoon tea". This includes drinking tea with a snack around 4 p. m. to avoid feeling hungry. It is a tradition that is still going today but has become less popular in recent times.

    In the late 1800s, the price of tea dropped a lot as more tea began to arrive on ships from India and China. It was no longer a drink just for rich people. Tearooms-shops where you could buy and drink tea-started to appear across the country. People enjoyed drinking tea and social activities in these places. At the start of the 20th century, Englishmen began to make tea in their homes whenever they felt like it. Kettles (烧水壶) became necessary in every kitchen.

    Fire was discovered many thousands of years ago. The first time humans saw fire was probably when a tree was destroyed by lightning(闪电).Humans soon learned how to make a fire. They probably made the first fire by rubbing (摩擦)two sticks together. Fire was very important to humans. They needed fire to keep warm at night. They used fire to cook food. ⑶They used fire to keep enemies and wild animals away. In some parts of the world fire was used to send messages. The Indians in America, for example, used fire to make smoke as a message. In some other countries people lit fires to warn their friends of danger. ⑷Fire was also used to give light. Before the invention of the oil lamp(灯), humans burned sticks to get light. One man even used fire to tell the time. He invented a candle clock. He made a candle that took exactly twelve hours to burn. Then he marked this candle in twelve equal(相等的) parts. He lit the candle and could tell the time by counting the number of parts left of the burning candle. But the candle clock did not always work well. If there was a wind blowing on the candle, it burned too quickly.