请根据下列情景将对话正确排序，并将其序号填在题后相应的横线上。

A . Since this morning .
B . OK ．Thank you ·
C . I've had a bad headaehe .
D . How long have you been like this ?
E ．What's the matter with you , Mr .Wang ?
F . Nothing seriou , . Take the medicine and have enough  rest , then you'll feel better .