题目内容

【题目】 Generally speaking,________ according to the directions,the drug has no side effect.

A.when taking B.when taken

C.when to take D.when to be taken

【答案】B

【解析】考查状语从句中的省略。在状语从句中,当从句主语与主句主语一致,且谓语动词含有be时,将从句的主语和be省略。空处补充完整应是:...,when the drug is taken。

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