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The scientists have made an exhaustive study of the virus _______ many people have been inflected.

A. to which B. in which C. with which D. for which

 

C

【解析】

试题分析:句意:科学家对许多人已经感染的病毒做出了详尽的研究。这里使用了定语从句,先行词是the virus,定语从句中使用了词组be infected with,所以缺少介词with和关系代词which,选C。

考点:考查定语从句

 

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