语法与词汇 12.When she saw how frightened he was at his mistake, her anger began to______.
【正确答案】 D
【答案解析】句意：当她看到他为自己所犯的错误感到害怕时，她的怒气渐渐平息了。die down(情绪、物质特性等)逐渐平息，减弱。die away(声音、风、光等)逐渐减弱，(树木等)渐渐凋零。fade away(颜色、希望等)逐渐消弱，减退。fall down倒下；跪拜。