根据对话内容,从对话后的选项中选出能填入空白处的最佳选项。

— What seems to be the problem?

—   1   

— How long have you been like this?

— Since Saturday night.

— _2   

— Yes, I also feel lighthearted.

— Can you think of anything you ate Saturday that might have caused it?

— All I can think of is the fish I had. It didn't taste quite right.

— 3      Now I'll give you some medicine. Take it and you should be feeling better soon.

—  4      

— I also suggest that you follow a special diet.

—     5      

— You should stick to eating lighter foods.

A. What's that?

B. That might be it.

C. Thank you, doctor.

D. Any other problems?

E. I have a running nose.

F. Have you seen a doctor?

G. I have a terrible stomachache.