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　　Agatha Christie was born on September 15th, 1890. She didn't go to school because her mother wanted to teach her at home. She studied the piano and singing in Paris.

　　She got married(结婚) in 1914 to a pilot and they had one daughter. During the First World War(战争), when she was working as a nurse, she began to write detective novels(侦探小说). In the hospital, she learned a lot about drugs, and she used these in her novels.

　　She wrote her first novel in 1920. The hero(主人公) was a detective, Hercules Poirot. The book soon became a best-seller and made her famous.

　　In 1928, Agatha Christie was lost. The police found her two weeks later. She didn't know anything. This was front page news in all the newspapers in Britain, and even today nobody knows what happened to her during those two weeks.

　　In 1929, Agatha Christie went on holiday to the Middle East. She came home to England in 1930.

　　After that, she travelled with her husband to the Middle East many times, and a lot of her later stories took place there, for example, Murder On The Nile. She also wrote the detective in the West End of London in 1952, and still on later.

　　During her life she wrote nearly eighty detective stories. She also wrote other novels under the pen name of May Westmacott. She died in January 1976 at the age of eighty-six.

　　Agatha Christie's detective novels are famous for their surprising endings.

1．Christie began to write detective novels ________.

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2．What may the word “drugs” here mean ________.

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3．Why was Christie lost for two weeks in 1928?

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A．Because she was ill.

B．Because she got married.

C．Because she wanted to write novels herself.

D．Nobody knows.

4．Who is Mary Westmacott?

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5．Why did her detective novels interest so many readers? Because ________.

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A．they have a sad ending

B．they have an unusual ending

C．there is always a murder in her novels

D．Christie was very famous

The bicycle is one of the simplest yet most useful inventions in the world. What is most surprising is that it was not ___1__ earlier, although the great inventor Leonardo Da Vinci had drawn pictures for bicycles and also for flying machines and some other things. Those things were not produced___2___ long after he died.
　　A person riding a bicycle uses ___3___ energy to make the bicycle move, and there is no pollution at all when you are riding. Even so, in developed ____4___, most people don’t travel to work by bicycle. It is not because the bicycles are expensive or people feel___5____ if they ride to work. It’s because __6___ cars on the roads becomes larger. It certainly becomes ___7___ to ride a bicycle. As a result, more people put their bicycles away and go to work ___8___ their cars , and in this way, the situation is made more serious.___9___ the best way to make riding safer and more popular is to create paths (开设通道) only for bicycles, and to make ___10___ so difficult and expensive for drivers to take their cars into the city that they will go back to use their bicycles.