参考答案

正确答案：C
解析：[听力原文]
Why did the driver stop the car?
根据选项可知问题询问关于he做某事的原因。文中关键句为“She was singing some of her highest and most difficult notes...As the car passed her...He put his brakes on violently, and as soon as the car stopped, he jumped out and began to examine his tires carefully.”约翰夫人在唱到高音时有位司机开车经过，他猛地刹车，然后跳下车仔细检查轮胎。因此他是听到一声类似轮胎故障的声音而停车。故正确答案为C)。