With the word "PM2.5"______ heard and seen in our life, people become more and more concerned about air pollution.
A．constantly B．occasionallyC．consequently D．contemporarily
A

試題分析：考查副詞辨析。句意：隨著“PM2.5”一詞在生活中不斷被聽到或看到，人們變得越來越關(guān)注空氣污染了。A不斷地；B偶爾；C因此，結(jié)果；D同時期地。故選A。
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