The purpose of the writer's writing the first paragraph is to ________．

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• 1By July 31，2012, the two explorers had covered about ________ on their expedition.

  A.1，100 miles

  B.900 miles

  C.550 miles

  D.400 miles

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• 2In order to carry out their expedition successfully, the two friends ________．

  A.rushed uphill every day to practice their shooting skills

  B.practiced survival skills in various arctic－like conditions

  C.learned from other arctic experts to deal with polar bears

  D.paddled their heavy kayaks over ice floes and icy rivers

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• 3The underlined word “turnover” in the sixth paragraph probably means _____.

  A.business profit

  B.the loss of staff

  C.market demand

  D.operation expenses

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• 4Why do white collar workers most probably like to be movie extras、

  A.They want to make more money.

  B.They want to start a career in acting.

  C.They think their regular job is boring.

  D.They think being on the stage is enjoyabl

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• 5According to the passage, movie extras should _____.

  A.have special talents

  B.have a flexible schedule

  C.make good connections

  D.make hundreds of phone calls daily

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• 6What can you predict logically happened to the two explorers the next day、

  A.They had a hard time finding their way back home.

  B.They shot the polar bear for food for their expedition.

  C.The polar bear probably attacked them the second night.

  D.They would set off and continued their expedition again.

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