You can imagine what great trouble they have________the problem ________.

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• 1_______ around the Water Cube, we were then taken to see the Bird's Nest for the 2008 Olympic Games.

  A.Having shown

  B.To be shown

  C.Having been shown

  D.To show

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• 2The stadium ________ by workers now will be finished by the end of 2012.

  A.to build

  B.built

  C.to be built

  D.being built

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• 3________ to work overtime that evening, I missed a wonderful film.      

  A.Having been asked

  B.To ask

  C.Having asked

  D.To be asked

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• 4The new library, ______ last week, is very popular _____ the students.    

  A.opening, to

  B.opened, with

  C.open, to

  D.having been opened,among

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• 5_______to hospital in time, the patients infected with bird flu were saved at last.     

  A.Having been taken

  B.Taking

  C.Being taken

  D.Having taken

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• 6We finally managed to make the customers _______ of the quality of the vehicle.

  A.to convince

  B.convincing

  C.convince

  D.convinced

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• 7_______from other continents for millions of years, Australia has many plants and animals not found in  any other country in the world.      

  A.Being separated

  B.Having separated

  C.Having been separated

  D.To be separated

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• 8________different kinds of pianos, the factory is sure they can satisfy people's needs .

  A.To produce

  B.Being produced

  C.Produced

  D.Having produced

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• 9We were greatly encouraged by the news of our team ____ another gold medal.   

  A.to have won

  B.to win

  C.won

  D.having won

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• 10He must have gone out. I heard the noise of the door _____ when I was still in bed.

  A.being locked

  B.to lock

  C.locking

  D.having locked

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