问题补充:
Generally speaking, according to the directions, the medicine has no side effect.
A. when taken
B. when taking
C. when to take
D. when to be taken
答案:
(答案→)A. when taken
B. when taking
C. when to take
D. when to be taken
解析:考查省略句。当状语从句的主语和主句主语一致的时候,且含有be动词的时候;可以把状语从句的主语和be动词一起省略。本题在when后面省略了the medicine is;句意:一般说来,当安装说明来服药的时候,药是没有副作用的。故A正确。
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