I was not quite sure __________.

A．what is she looking for

B．why she came late for school

C．how did she deal with the problem

D．if she has arrived

男性，45岁，心功能好，支气管镜检查结果为鳞癌，胸片及CT等检查分期为T2N0M0，首选治疗方案为()

A.根治性手术 

B.根治性放疗 

C.根治性放疗+手术 

D.术前放疗+手术 

E.单纯化疗