阅读下面短文，从短文后所给的A、B、C、D四个选项中选出能填入相应空白处的最佳选项。

Alan is a middle school student. Today he went to see a 1 because he didn't feel well. The doctor 2 Alan some questions and then let him get up to look him over. After that, the doctor 3 the room. A moment later, he came in with three bottles of different pills in his 4. The doctor sat in front of Alan and 5, "Take the green pills with a big glass of water before breakfast. Take the blue 6 with a big glass of water after lunch. Then take the red pills with a big glass of water before going to bed." Alan's face became pale (苍白的). He looked very 7. He stammered (结巴地说), “Doctor, is there anything 8 with me?" The doctor answered quietly, "No, 9 serious. You just need to drink more 10 every day." "Well, thank you," Alan smiled.