________to nuclear radiation, even for a short time, may influence genes in human bodies.

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问题 ________to nuclear radiation, even for a short time, may influence genes in human bodies.

选项 A、Having exposed
B、Being exposed
C、To expose
D、Exposed

答案B

解析 考查非谓语动词。句意:暴露于核辐射中即使只有很短时间,都会影响人体的基因。分析句子成分发现even for a short time是插入语,may influence是谓语,前面的部分应该是主语,be exposed to表示“暴露于”,要用动名词形式做主语,故用Being exposed to。故本题选B。
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