WiththewordPM2.5constantlyappe

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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A．look up

B．refer to

C．make out

D．go over

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A．meaning

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A．caught

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A．talk; sat

B．talking; sitting

C．talking; sat

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A．arrive

B．arriving

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