-Michael was late for Mr.Smith's oral class this morning.

-        ?As far as I know,he never came late to class. [ ]

A.How come

B.So what

C.Why not

D.What for

王某，男68岁，素有咳喘史20余年。近5天咳喘加重，呼吸浅短难续，声低气怯，张口抬肩，倚息不得卧，痰多色白如沫，咯吐不利，胸闷心慌，汗出怕冷，舌淡苔白，脉沉细。

选方宜（）

A.二陈汤合三子养亲汤

B.补肺汤合平喘固本汤

C.补肺汤

D.定喘汤

E.参附汤