The speaker was very good at describing feelings. The of his words moved every listener.
A. power
B. quality
C. opinion
D. influence
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(答案→)A. power
B. quality
C. opinion
D. influence
解析：考查名词辨析。A. power力量；B. quality质量；C. opinion观点；D. influence影响。句意：演讲者非常擅长描述情感，他话的力量感动了每一位听众。故A正确。