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50. Where can a visitor enjoy a good but not too expensive meal?

• A、The Silver Palace Restaurant. 
  
  

• B、Any restaurant in Old Sacramento. 
  
  

• C、Old Sacramento State Historic Park. 
  
  

• D、The California State Railroad Museum. 
  
  

17. The park is to a city (   ) the lung is to man' s body. 

• A、as
  
  

• B、that
  
  

• C、which
  
  

• D、what
  
  

55. (      )