小狗 / 侧耳 / 听到 / 主人 / 的 / 脚步声 / 立刻 / 跑 / 了 / 过去小狗侧耳听到主人的脚步声,立刻跑了过去。The puppy perked up its ears when it heard its master's footsteps and immediately ran over.