根据对话内容，选择恰当的句子补全下列对话。（每小题1分，共 5分）
(At the doctor’s)
A: Good morning, doctor!
B:           What’s wrong?
A: I have a sore throat.         
B: How long have you been like this?
A:       
B: Have you taken your temperature?
A: Yes. My temperature is OK.
B:       Say “Ah”… You have a cold.
A: Is it serious?
B: Nothing serious.           You’ll get better soon.
A: Thank you, doctor!

A. I’m feeling terrible. B. I’m sorry to hear that. C. Open your mouth. D. I have a fever. E. Take the medicine three times a day. F. Good morning, young man! G. Since yesterday morning.