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It is believed that good looks can last forever,but at nearly 600 years of age.  the time is catching up with the Mona Lisa.    

 The famous painting that was painted by Leonardo Da Vinci in 1505 is getting worse by the year. It is kept in the Louver Museum (盧浮宮) inFrance.

"The thin,wooden board where the Mona Lisa is painted has changed its shape." the museum said. Visitors have noticed the changes,but repairing the world's most famous painting is not easy. Experts are not sure about the materials (材料) the Italian artist used.

Nearly 6 million people go to see the Mona Lisa every year. Many of them are interested in the mystery of her smile. "It is very interesting that when you're not looking at her,she seems to be smiling,and when you look at her and she stops smiling. ” said Mr Livingstone,who is working in Harvard University. "It's because direct vision (視覺) is good at picking up detail (細節(jié)) ,but not good at looking at shadows (暗影) .Da Vinci painted the smile in shadows."

However,the history of the Mona Lisa is just as mysterious as the smile. Da Vinci himself loved it so much that he always carried it with him,until it was sold toFrance's King Francis I in 1519.

In 1911,the painting was stolen from the Louvre by a worker who used to work there. He took it out of the museum and hid it under his coat. He said he planned to return it toItaly. The painting was sent back toFrancetwo years later. During World War II,French hid the painting in small towns to keep it out of the hands of German forces (軍隊) .

(   ) 41. What does the writer mean by "the time is catching up with the Mona Lisa"?

   A. The painting is not so beautiful any more.

   B. Mona Lisa runs very slowly.

   C. The long time has affected the famous painting.

   D. The painting is no longer popular.

(   ) 42. It's difficult to repair the painting because         .

   A. the wooden board is thin and old

   B. experts aren't sure about the materials

   C. the painting has a long history

   D. It was painted by Leonardo Da Vinci

(   ) 43. What makes her smile so mysterious according to Mr Livingston?

   A. The materials the Italian artist used.

   B. Mona Lisa's good look.

   C. The way Da Vinci painted the smile.

   D. The history of the painting.

(   ) 44. Which of the following is true about the painting?

   A. It was once taken away and hidden up by German forces.

   B. Its painter himself loved it so much that he kept it in shadows.

   C. Mona Lisa stops smiling when you look at her wanting to see her smiles.

 

   D. King Francis I bought it and then returned it toItaly.

(   ) 45. During the World War II,the famous painting was in         .

   A. Italy   B. France   C. Britain   D. Germany


  

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