Some people can never go above 4,000 meters because their body is unable to ______ to these extreme conditions.

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• 1These kids are quick at learning. We had better have them ________ in a new way.

  A.having been trained

  B.training

  C.being trained

  D.trained

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• 2_____ that he isn't adequate to the present job, he devotes all his spare time to studying  professional knowledge

  A.Concern

  B.To concern

  C.Concerned

  D.Concerning

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• 3Li Ming is said ______ the experiment in the lab, but I can't find him there

  A.to have done

  B.to do

  C.to be doing

  D.doing

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• 4.His conclusion, ______ on careful research, was acceptable.

  A.to base

  B.to be based

  C.basing

  D.based

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• 5It is not like Mr．Smith, who is a gentleman, _____his wife so rudely．

  A.to treat

  B.treating

  C.should treat

  D.treated

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• 6Little Tom admitted ______ in the examination, ______ that he wouldn't do that in the future.

  A.to cheat; to promise

  B.cheating; promised

  C.having cheated; promising

  D.to have cheated; promised

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• 7Russia's president fires senior military officers for failing to stop a naval base ______ by wildfires that have killed 48.

  A.being swept

  B.swept

  C.to be swept

  D.having swept

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• 8______ good , the fish was eating up in no time.

  A.Smelt

  B.Smelling

  C.Having smelling

  D.Being smelt

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• 9To celebrate the New Year, the students stayed in the classroom after school, _____ the performances and ______ the room.

  A.practicing ; preparing

  B.practiced ; prepared

  C.to practise ; prepare

  D.practicing ; prepared

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• 10We're looking forward __________ the photo exhibition

  A.to visiting

  B.to visit

  C.to having visited

  D.visiting

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