假设你是林华，今天在学校的公告栏上看到下面一则海报。现在请你写一封e-mail给你的好朋友sam, 一个集邮爱好者，告诉他有关海报的内容，并邀请他和你一起去参观邮票展。 邮 票 展 想度过一个特别的周末吗？来看看我们的邮展吧！这里将展示国内外各种邮票，还将出售有关邮票的书籍，另外我们还设有邮票交换角。 主办者：少年宫    地  点：艺术中心   时  间：10月15日（星期六） 友情提示：参加者需准备6枚用以交换的邮票 注意：
1.词数不少于80，开头和结尾已为你写好，不计入总词数。2.根据内容要点适当发挥，注意行文连贯。3.参考词汇：交换-exchange
hi sam,     i have good news to tell you. there’ll be a stamp show in art center on saturday, october 15, which is held by children’s palace, different kinds of stamps from both home and abroad will be on display. books about stamps will also be available. besides, there’ll be an exchange corner at the show, anyone who wants to watch the show needs to prepare six stamps for exchanging.    i want to take part in the activity, would you like to go with me? i think we can make lots of friends who have the same hobbies as us, and maybe we can get some stamps that we have been expecting, i’m sure we’ll have a special weekend.    if you’d like to go, please let me know.