Only when you have obtained enough data ________ come to a sound conclusion.

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• 1-- It is fairly warm today. -- So _____ and so _______ yesterday.

  A.it is, was it

  B.it is, it was

  C.is it, was it

  D.is it, it was

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• 2Not until recently _______ paid work outside the home.

  A.most mothers in Britain took

  B.did most mothers in Britain take

  C.took most mothers in Britain

  D.were most mothers in Britain taken

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• 3The door burst open and ________　， shouting with anger.

  A.rushed in a crowd

  B.in a crowd rushed

  C.a crowd in rushed

  D.in rushed a crowd

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• 4Although there seemed some signs of recovering, experts said that few, _____, could come back to normal after getting this disease.

  A.if any

  B.if ever

  C.if not

  D.if so

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• 5一Oh, poor Peter looks very weak. 一＿____ if you suffer from a high fever for three days on end.

  A.So are you

  B.So you are

  C.So will you

  D.So you will

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• 6He said he would arrive before seven, and______ ．

  A.he did

  B.did he

  C.he had

  D.had he

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• 7______，I will help you with your work.

  A.If I am possible

  B.If it possible

  C.If possible

  D.Possible

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• 8Only when he arrived home _________ that he had left his key in the office.

  A.will he realize

  B.he did realize

  C.did he realize

  D.should he realize

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• 9_______ he met with the difficulty did he realize the importance of our help.

  A.Even though

  B.Only before

  C.Never until

  D.Ever since

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• 10By the side of the teaching building of our school _________, which was completed in 2009.

  A.there standing the library

  B.does the library stand

  C.the library stands

  D.stands the library

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