治疗呼吸道感染宜选（）。

A．磺胺嘧啶（SD）+TMP

B．磺胺甲噁唑（SMZ）+TMP

C．磺胺嘧啶银

D．磺胺醋酰钠（SA）

E．磺胺嘧啶（SD）+链霉素

Lily is a good student. She           late for school.[ ]

A. is hardly ever        

B. isn't never

C. is often              

D. is always