48. The colonists defeated the British at last because (   ). 

• A、American people fought for freedom bravely
  
  

• B、Washington led the army correctly
  
  

• C、French helped them
  
  

• D、All the above are right. 
  
  

52 .(    ).

30. (      )

• A、running
  
  

• B、walking
  
  

• C、driving
  
  

• D、climbing