Only according to the directions can the medicine be quite effective .A. taking B. taken C

发布时间：2020-08-16 10:06:48

Only      according to the directions can the medicine be quite effective .
A. taking
B. taken
C. being taken
D. having been taken

网友回答

A. taking
(答案→)B. taken
C. being taken
D. having been taken
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