They are at the news.A. frightening, frightenB. frightened, frighteningC. frightening, f

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A. frightening, frighten
(答案→)B. frightened, frightening
C. frightening, frightening
D. frightened, frightened
解析：句意，他们害怕这个令人恐惧的消息。frightened指人“对……害怕”；frightening指物本身“令人害怕”，故选B。