38. "... he hasn't forgotten one of Mark's seventeen birthdays"means (   ).

• A、he has forgotten more than one
  
  

• B、he sent Mark something on his 17th birthday
  
  

• C、he always sends a Christmas card on Mark’s birthday
  
  

• D、he always sends Mark something on his birthday
  
  

12. Everyone (   ) to arrive at the gate on time on Saturday. 

• A、supposes
  
  

• B、supposed
  
  

• C、is supposed
  
  

• D、would he supposed
  
  

51.(      )