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--How did he get infected? --She ____the...

--How did he get infected?

--She ____the viruses without any protection.

A.exposed to

B.had exposed to

C.was exposed to

D.had been exposed

 

C 【解析】试题分析:考查时态和语态。根据句意,表被动,排除A,B。根据上下文可知,是陈述过去的一个事实,故使用一般过去时。句意:——他是怎样感染的?——在没有任何保护的情况下面临病毒感染。 考点:考查时态和语态。
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