One day, a little rabbit is at home. 一天，一只小兔子待在家里。 Knock, knock, knock! 咚咚咚！ Little Rabbit: Who's there? 小兔子：谁呀？ Big Wolf: It's your mom. Open the door, please! 大灰狼：是你妈妈。请开门！ Littl...