A: Excuse me, is this the registration office?B: Yes. 1)_____________ do for you?A: May I change the major? I prefer Business Management to Business English.B: Have you declared your major?A: Yes, I have.B: Well, 2)_____________ are you in?A: 3)_____________.B: Please 4)__________ the application form（申请表）over there and we will call you shortly.A: Thank you very much.B: 5)_________________.