—I'm not sure _______ it's fine tomorrow.

—Of course it is. The radio says it'll keep fine these days. [ ]

A. whether

B. when

C. what

D. where

发展中医药事业应遵循的原则（）

A.预防与保健相结合

B.继承与发扬相结合

C.发扬与创新相结合

D.继承与创新相结合

E.以上都不是