— Do you regret________ up your opinion that every child should take part in service learning?

— No.On the contrary, I think it is very necessary. [ ]

A. bringing  

B. to bring

C. to be brought  

D. being brought

不宜与食醋同时服用的药物为（）

A.磺胺类药物

B.碳酸氢钠

C.呋塞米

D.氨基苷类抗菌药

E.维生素B₁