___________,follow the directions on the bottle carefully
A:when taken drugs
B:when drugs taken
C:when one takes drugs
D:when taking drugs
人气：426 ℃ 时间：2020-02-03 16:35:30
解答
选D
主语是省略了you的祈使句
主句主语you和take drug的关系是主动的关系
:when taking drugs=when you take drugs
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