11. Look out! Don't get too close to the house (   ) roof is under repair. 

• A、whose
  
  

• B、which
  
  

• C、of which
  
  

• D、that
  
  

54. (     ) 

7. She always help her mother with housework at home. She (   ) needs to be called. 

• A、often
  
  

• B、sometimes
  
  

• C、never
  
  

• D、usually