Q:
      
      
         
            
In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.
___________ it became difficult to empirically prove that children __________ better in private schools, the attack __________ a new weapon: per unit cost of learning outcomes. Most of the learning outcome researches almost _______________ fail to understand the entire ______________ of education in any depth and reduces it to learning of socalled 3Rs for economic purposes.
the attack __________ a new weapon
 
 
         
       
      
      
      
          
      
      
      
      
      
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