_海南成考网

15. Jack was happy that the train (   ) when he (   ) the station. 

• A、left; had arrived
  
  

• B、had not left; arrived
  
  

• C、had not left; had arrived
  
  

• D、left; arrived
  
  

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. 
  
  

55.(     )