23. So quickly ____________ is a possibility today may be a reality tomorrow.

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• 1Only when I left my parents for Italy ________ how much I loved them.

  A.I realized

  B.I had realized

  C.had I realized

  D.did I realize

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• 2Only after you have known someone for some time ________ producers his real worth.

  A.you begin

  B.do you begin

  C.you do begin

  D.begin you

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• 3Not until________,_________.

  A.did she take off, I realized

  B.she took off, did I realize

  C.did she take off, did I realize

  D.she took off, I realized

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• 4— People says your little brother has been admitted into Qinghua University. — Yes. Never ________ he could achieve so much success.

  A.I had thought

  B.I would have thought

  C.could I have thought

  D.will I have thought

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• 5______ seen such a magnificent city as Beijing.

  A.I before never have

  B.Never have before I

  C.Never before have I

  D.Before never have I

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• 6Little _______ what you said. I wish you repeated it.

  A.I understand

  B.did I understand

  C.I did understand

  D.have I understood

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• 7It is no doubt that once ________ this city, you’ll find that there is so much surprise waiting for you to discover.

  A.visit

  B.visiting

  C.visited

  D.to visit

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• 8Never in my wildest dreams ______ these people are living in such poor conditions.

  A.I could imagine

  B.could I imagine

  C.I couldn’t imagine

  D.couldn’t I imagine

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• 9＿＿＿that we couldn’t catch up with him.

  A.So fast he ran

  B.So fast did he run

  C.So fast ran he

  D.Such fast did he run

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• 10They finally managed to climb to the top,but ＿____＿then.

  A.went the children down the hill

  B.down the hill did the children go

  C.down the hill went the children

  D.down the hill the children went

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