—What did the doctor say yesterday afternoon?

—He said, “______ on time, this medicine will be quite effective.”

A. Taking B. Being taken

C. Taken D. Having taken

C

【解析】

試題分析：考查過去分詞及條件狀語從句的省略。句意：昨天下午醫(yī)生說什么了？他說，如果按時(shí)吃藥，這種藥是非常有效的。原句可改為：If it is taken on time, this medicine will be quite effective. 故選C項(xiàng)。

考點(diǎn) : 考查過去分詞及條件狀語從句的省略

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