The dog was so to its master that it would not leave him, even when he was dead.Adevo

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(答案→)A. devoted
B. mean
C. active
D. generous
解析：形容词辨析。A努力，致力；忠诚，专心B卑鄙，自私，低微；C积极；D慷慨；句意：那条狗对主人是如此的忠心以至于即使主人死了，它也不离开。根据句意说明A正确。