11. Jim and Tom could hardly be friends, (   )?

• A、could Jim
  
  

• B、couldn't Tom
  
  

• C、couldn't they 
  
  

• D、could they
  
  

7. In April, thousands of holidaymakers remained (   ) abroad due to the volcanic ash cloud. 

• A、sticking
  
  

• B、stuck
  
  

• C、to be stuck
  
  

• D、to have stuck
  
  

53. (    )