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. exposed B. exposing

C. are exposed D. are exposing

A

【解析】

試題分析：試題分析：考查省略句的用法。如果主句的主語和從句的主語一致，并且謂語動(dòng)詞是系動(dòng)詞的情況下，從句就可以把主語和系動(dòng)詞都省略。所以全句應(yīng)該為：Woman, (who are）exposed to air pollution before giving birth to a baby。本題意為：根據(jù)十二月九號(hào)的報(bào)道，女人，在生孩子之前受到空氣污染的影響，將有更大幾率產(chǎn)下患有心臟缺陷的兒童。故這道題應(yīng)該選A項(xiàng)。

考點(diǎn)：考查省略句的用法。

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