16.This drug is less likely to cause side effects when ______ late in the day.( 。
A.takenB.takingC.to takeD.being taken

分析 這種藥在白天晚些時候服用的時候產(chǎn)生副作用的可能性要小些.

解答 答案:A
解析:后面的句子完整的形式為:when it is taken late in the day(因為"藥"與"服用"時間是被動關(guān)系,所以要用被動語態(tài)).此處是省略了從句的主語it及be動詞(is),而直接使用動詞的過分詞形式作時間狀語.

點評 本題考查過去分詞,做此類題目一定要仔細(xì)分析句子結(jié)構(gòu)并根據(jù)句意找出所缺的成分,再分析各個選項的含義及用法,選出最終答案.

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