Although the causes of cancer         , we do not yet have any practical way to prevent it．     

试卷相关题目

• 1______ around the Water Cube, we were then taken to see the Beijing National Stadium, known as the Bird's Nest.

  A.Having shown

  B.To be shown

  C.Having been shown

  D.To show

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• 2— Did you move into the new house? — No. The rooms ______ yet.

  A.were being painted

  B.are painting

  C.have not painted

  D.have not been painted

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• 3A large park ________ here now.They hope to finish it in three months.

  A.is built

  B.will be built

  C.has been built

  D.is being built

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• 4With more forests being destroyed, huge quantities of good earth          each year.       

  A.is washing away

  B.is being washed away

  C.are washing away

  D.are being washed away

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• 5--- I don't suppose the police know who did it.   --- Well, surprisingly they do. A man has been arrested and ____ now.   

  A.has been questioned

  B.is being questioned

  C.is questioning

  D.has questioned

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• 6I have to go to work by taxi because my car __________ at the garage.

  A.will be repaired

  B.is repaired

  C.is being repaire

  D.D.has been repaired.

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• 7Traditional folk arts of Tianjin like paper cutting ________ at the culture show of the 2010 Shanghai World Expo.

  A.are exhibiting

  B.is exhibiting

  C.are being exhibited

  D.is being exhibited

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• 8---Hi, Terry, can I use your computer for a while this afternoon?---Sorry. _____ .

  A.It's repaired

  B.It has been repaired

  C.It's being repaired

  D.It had been repaired

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• 9I like these English songs and they _____ many times on the radio.

  A.taught

  B.have taught

  C.are taught

  D.have been taught

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• 10Do you know the thief _____ by the police?

  A.has caught

  B.has been catching

  C.will catch

  D.has been caught

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