你以前这样想过吗？为什么描述“在某月”用in、“在某日”用on、“在几点”用at？为什么描述“在某个城市”用in、“在某个街上”用on、“在某个门口”用at？这in、on和at之间到底是什么关系，有什么区别？
#大有学问#图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络图片来自网络
DearMike，Spring Festival iscoming and all my family are very busy. We are getting ready for it. Mygrandfather is making big red lanterns. Red means good luck in China. My fatheris cleaning the house and my mother is making jiaozi. It’s a kind oftraditional food in China and it’s very delicious. My brother is decorating thedoors and windows and I am sweeping the floor.
