_阜陽成考網

39. This selection was probably written to (   ). 

• A、show how lazy cats are
  
  

• B、talk about the habits of cats
  
  

• C、tell about famous people and their habits
  
  

• D、persuade people to take naps
  
  

10. Only then (   ) that he had left his key on his office. 

• A、he realized
  
  

• B、did he realize
  
  

• C、had he realized
  
  

• D、he had realized
  
  

52. (    )