All mammals have hair, but not always evident.

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• 第1题：

  A professor of economic and history at Atlanta University, W.E.B. Du Bois, promoted full racial equality.
  A．economy
  B．economics
  C．economical
  D．economic
  

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• 第2题：

  All living creatures pass on inherited traits from one generation to other .
  A．the other
  B．another
  C．others
  D．other one
  

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• 第3题：

  A promising note is a written agreement to pay a certain sum of money at some time future .
  A．time futures
  B．futures
  C．futures time
  D．future time
  

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• 第4题：

  All root vegetables grow underground, and not all vegetables that grow underground are roots.
  A．but
  B．or
  C．as
  D．thus
  

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• 第5题：

  Although the social sciences different a great deal from one another, they share a common interest in human relationship.
  A．move
  B．differ
  C．change
  D．varies
  

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• 第6题：

  Not much people realize that apples have been cultivated for over 3,000 years.
  A．Not many
  B．Not enough
  C．Without many
  D．No many
  

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