A serious study of physics is impossible________some knowledge of mathematics.

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• 1If you pay for the computer in cash, you could have a 5% discount; _______ we can deliver it to you for free. 

  A.in demand

  B.in addition

  C.in return

  D.in place

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• 2Everybody was touched _________ words after they heard her moving story.

  A.without

  B.beyond

  C.of

  D.in

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• 3Vitamin D helps our bodies make a special chemical，and this special chemical，________，affects our brains，making us feel happy.

  A.in turn　

  B.in particular

  C.in advance

  D.in short

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• 4Finding a job in such a big company has always been ____ his wild dreams.

  A.under

  B.above

  C.over

  D.beyond

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• 5They did everything in their power to save the building dating back to the Qing Dynasty, but their efforts were _______.

  A.in turn

  B.in time

  C.in vain

  D.in need

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• 6________all the animals I've ever had，these two dogs are the most sensitive to the spoken word.                                                        

  A.From

  B.Of

  C.For

  D.With

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• 7The woman sold the eggs ________ seven dollars and they were sold________half price.

  A.with；at

  B.for；at

  C.at；in

  D.by；on

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