Samples of blood from Cholera infected patients have been sent to the blood center _______.

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• 1Tom hurried to the lecture hall, only _____ the president's speech had been canceled.     

  A.to tell

  B.to be told

  C.telling

  D.being told

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• 2—What are you busy with?—The conference ______ in our city next week.

  A.held

  B.will be held

  C.being held

  D.to be held

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• 3Earth is believed _____ by an object the size of Mars at some point in the distant past before its surface cooled.

  A.to be hit

  B.to have hit

  C.to have been hit

  D.to hit

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• 4The novel gone with wind is said _____ into several language.

  A.to translate

  B.being translated

  C.having been translated

  D.to have been translated

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• 5When asked why he went there, he said he was sent there ______ for a space flight.    

  A.training

  B.being trained

  C.to have trained

  D.to be trained

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• 6Five people were reported ________ in the accident.   

  A.to be killed

  B.to kill

  C.killed

  D.to have been killed

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• 7Having a trip is certainly good for us, but it remains____ whether you will enjoy it.     

  A.to see

  B.to be seen

  C.seeing

  D.seen

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• 8China is known _____ greatly in terms of its cultural values over the past few years.

  A.to change

  B.having changed

  C.changing

  D.to have changed

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