Is she diligent or something?

涂于德

Is she diligent or something?  

       As a teacher, young Mr Smith is responsible，earnest and warm-hearted. Yesterday, during the evening classes, he asked a girl student named Susan to correct her class work. After rewriting her work for five times, she had no way to fulfill the exercises completely rightly. It was near the end of the evening self-study classes. Young Smith had to ask Susan to go back to Dormitory first:
-----Finish and hand it in tomorrow morning.
-----No, I’ll complete it right now.
-----But it’s time for bed. It’s rule that everyone must go to Dormitory right now.
-----No, I won’t go until I finish it!
       Two students, who were on duty to lock the door, were waiting. Both they and young Smith were getting annoyed. Was the girl Susan diligent or something else?