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    精英家教网 > 高中英语 > 题目详情
    --How did she get infected?
    --She ________the virus without any protection.
    A．exposed toB．had been exposed toC．had exposed toD．was exposed to
    D

    试题分析：考查时态。句意：--她是怎样被感染的？--她暴露于病毒中而未采取任何保护措施。be exposed to sth暴露于......，是固定搭配。排除A、C；这里没有明显的过去的动作，不能用过去完成时；叙述过去发生的事情，用一般过去时。故选D。
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