Dear Betty,I'm glad to tell you about the Spring Festival in China. It's our traditional festival and we usually have a big celebration. Before the festival, we buy new clothes and clean our houses. On the eve of the Spring Festival, we have a big dinner with our family. We usually eat dumplings and watch the Spring Festival Gala on TV. During the festival, we set off fireworks and visit our relatives and friends. We also get lucky money from the elders. It's a very happy time for us.
How do you celebrate your festivals? Please write to me soon.
Your friend,
Annie

【解析】：
题目考查的是英语邮件的写作，需要向笔友介绍春节的习俗。根据题目提示，我们可以选择买新衣服、收压岁钱、包饺子、放烟花、吃大餐、看春晚等习俗进行描述。在写作时，要注意邮件的格式，包括称呼、正文、结尾和署名。同时，语句要通顺，书写要工整，且正文不少于50个词。
【答案】：
Dear Betty,
I'm glad to tell you about the Spring Festival in China. It's our traditional festival and we usually have a big celebration. Before the festival, we buy new clothes and clean our houses. On the eve of the Spring Festival, we have a big dinner with our family. We usually eat dumplings and watch the Spring Festival Gala on TV. During the festival, we set off fireworks and visit our relatives and friends. We also get lucky money from the elders. It's a very happy time for us.
How do you celebrate your festivals? Please write to me soon.
Your friend,
Annie