单项选择题

Receptionist: Good morning. Hopkins Dental Surgery. Charles: Good morning ______. Receptionist: I see. Can you come on Thursday morning Charles: No, sorry I can't. I'm afraid I have classes every morning.

A.I'd like to make an appointment to see the dentist, please.
B.I've got a toothache. Would you please help me
C.I've got the toothache. When can you come to see me
D.I would appreciate it if you tell the dentist to come right now.