单选题
Nuclear power plants, ______ to some serious breakdowns, have become a center of controversy.
A、
having recently been subjected
B、
recently having been subjected
C、
have recently subjected
D、
recently have subjected
【正确答案】
A
【答案解析】
subject…to…“使……遭受……”，因此需要用过去分词作状语，而副词要放在主动词和分词之间，因此可确定A为正确答案，过去分词的完成式，表示分词的动作发生在主句的谓语动作之前。
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