19. The teacher was (   ) in the middle of the class because some naughty boys played tricks on her in class. 

• A、put down
  
  

• B、hung up
  
  

• C、broke in
  
  

• D、cut off
  
  

52 .(    ).

38. In the"whisper test"the little girl (   ).

• A、had her bad ear shut completely 
  
  

• B、had her both ears shut completely 
  
  

• C、could hear the teacher with her good ear 
  
  

• D、couldn't hear the teacher at all