With the ______word “ PM2.5” constantly appearing in _____media reports, people pay greater attention to it and seek health tips for smoggy days.
| A．the; / | B．the; the |
| C．a; the | D．a; / |
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With the ______word “ PM2.5” constantly appearing in _____media reports, people pay greater attention to it and seek health tips for smoggy days.
| A．the; / | B．the; the |
| C．a; the | D．a; / |
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