单选题 The noise was so ______ that only those with excellent hearing were aware of it.
【正确答案】 C
【答案解析】本题考查形容词辨析。faint“(声音、光线等)模糊的,微弱的”;dim“(尤指光线)暗淡的,模糊的”;soft“温柔的,柔和的”,与rough相对;gentle“温和的,文雅的”,强调“对于力量的克制”,并含有“使人感觉愉快舒适”之意,如:She is gentle in touch, manner, and voice.她在气质、态度、声调方面都温柔和蔼。句意为:那声音太微弱了,只有听力非常好的人才能察觉到。