2.C 【句意】这声音是如此微弱，以致只有听力极好的那些人才能察觉到它。 【解析】形容词词义辨析。dim“暗淡的，昏暗的；模糊的”；soft“柔软的；温柔的；软弱的”；faint“（光、声、味）微弱的；不清楚的；虚弱的”；gentle“温和的；温柔的”。由句中关键词“only those with excellent hearing were aware of it只有听力极好的那些人才能察觉到它”的对应知“微弱的”符合语境，故C项正确。
【汉译英参考答案】 1.Bezos, who married MacKenzie in 1993, a year before he started Amazon from his garage in Seattle, broke the news of the split in a tweet signed by both of them.
