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3.Women,        to air pollution before giving birth to a baby,are more likely to give birth to children with heart defects,researchers reported on December 29.(  )
A.exposedB.exposingC.are exposedD.are exposing

分析 研究人员在12月29日报告说,如果在生孩子前暴露于空气污染中,妇女更可能生出有心脏缺陷的孩子.

解答 答案选A.本题考查过去分词;句中已经有了谓语动词are,故空格处需要的是非谓语动词,排除C和D;题干中运用了短语be exposed to 暴露,遭遇;英语中很多类似的"be+过去分词+to do/介词/从句"的结构往往表示逻辑主语的状态,只需要去掉be动词,用过去分词短语做状语、定语或补语,故选A;

点评 首先判断选项中的动词在句中是以谓语还是非谓语形式出现,然后根据选项在句中的功能结合非谓语的基本用法做出合理的判断.要关注常见非谓语动词的搭配.

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