Only when ________ according to the directions can the medicine be quite effecti

题干

Only when ________ according to the directions can the medicine be quite effective.

A．taking	B．taken
C．being taken	D．having been taken

上一题下一题 0.4难度单项选择更新时间:2019-07-15 05:44:10

小学学科试题库

初中学科试题库

高中学科试题库