______ to nuclear radiation, even for a ...

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

A. Having exposed B. Being exposed

C. To expose D. Exposed

B 【解析】考查动名词。句意：暴露于核辐射中甚至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“暴露于”，要用动名词Being exposed to。故B选项正确。

考点分析：

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