【内容提示】
冬天里，一场大雪过后，大地积雪皑皑。这时，假如有人问你最愿意干的事是什么，你的回答十有八九是“打雪仗”。正好，有一个星期五的下午，下课以后你们老师走进教室建议第二天早晨你们上山玩打雪仗游戏，同学们齐声响应。请你把你们玩打雪仗的情况写成一篇文章。
【作文示范】

A Happy Day
Winter came and the first snow began to fall. It was early Saturday morning. When I got up and looked out of the window, I saw trees, roofs and the ground all covered with snow. The world seemed to be a vast expanse① of whiteness②. How beautiful!“A heavy snow, a rich harvest.”Peasants must be very happy. I was happy, too, because…. Well, let me tell you.In the previous afternoon, when school was over, our teacher came into the classroom. “Shall we go to the hill and have a snow fight?”she asked us with a smile.“Good!”the whole class shouted cheerfully.
That's why I was so happy in the morning.
When we got to the hill, we started making snow balls at once. Suddenly a snow ball hit me in the face. How cold! When I had made enough snow balls, I began to throw them at my“enemies”.
We threw snow balls at each other; we kept laughing and shouting. What great fun! We were children again. We did not stop enjoying ourselves until we could not see each other clearly for the dark.
On our way home, we were still talking about our snow fight. The wind was blowing hard, but we did not feel the cold. What a happy day!

（选自1988年4月19日《上海学生英文报》）
【词语解释】
①expanse[iks'p$ns] n．广阔（的区域）；浩瀚②whiteness ['waitnis] n．白；白色
【写法指要】
文章的引言段写到“瑞雪兆丰年”，农民高兴，自己也高兴。接着用插叙的手法写前一天下午老师的建议。第三段是过渡段。然后，四、五段是打“雪仗”的场面描写。结尾段写他们的兴奋劲，点题并与标题照应。