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.