姚舜禹

This morning，when I looked out of the window，I found the whole world white. On the way to school，all cars drove carefully and slowly.

But why was there such dense fog？ It was because the cold air from the north collided（相撞）with the typhoon. Typhoon was hot. The dense fog was formed.

As time went on，the fog gradually disappeared. Lost buildings reappeared. I was happy today.