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57.(  )

32.(   )

• A、requests
  
  

• B、commands 
  
  

• C、guidance
  
  

• D、reference
  
  

4.Directions:In each of the following groups of words, there are four underlined letters or letter combinations marked A, B, C and D. Compare the underlined parts and identify the one that is different from the others in pronunciation. Mark your answer by blackening the corresponding letter on the Answer Sheet.（）

• A、 cha（s）e
  
  

• B、ba（s）e
  
  

• C、ea（s）e
  
  

• D、ca（s）e