对话排序
①Is it anything serious?
②My head hurts. I feel terrible. 
③Please sit down. Let me have a look at you. 
④What's wrong with you, young man? 
⑤No, nothing serious. Take this medicine and you can be better soon. 

A．①②④③⑤

B．④②③①⑤

C．③④②①⑤

D．④②①③⑤