单选题 Tom's steps had ______ and there was a moment of absolute silence.

【正确答案】 C

【答案解析】句意：汤姆的脚步声消失了，接下来是一阵沉寂。die down逐渐减弱，逐渐平息。die from因…而死亡。die away(声音)渐渐消失。die out灭绝，绝迹。