Question

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

Answer 1

C

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。