Generally speaking,______ according to directions,the drug has no side-effect.A.when taking B.when taken C.when to take D.when to be taken还有原因、谢谢、

问题描述:

Generally speaking,______ according to directions,the drug has no side-effect.
A.when taking B.when taken
C.when to take D.when to be taken
还有原因、谢谢、

B
省略语句

B.
when the drug is taken