There is no doubt,  in my opinion,  ________matters is not the speed,  but the quality of the products.[ ]

A. that  

B. which

C. what that  

D. that what

温经汤的君药是（）。

A.桂枝、半夏

B.吴茱萸、桂枝

C.桂枝、当归

D.吴茱萸、当归

E.半夏、生姜