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 |
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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 |
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