【正确答案】 Dear Jessie,
Thank you for your kind invitation to your wedding.
Unfortunately, I regret to tell you that due to some prior engagement, I will be unable to attend your wedding. I wish I could be at both places at the same time. Please accept my humble apologies for not being able to show up at your wedding ceremony. Nevertheless, thank you again for inviting me and I am sure that your special day will be a happy and joyous occasion. I will share your joy in my heart from afar. Best wishes for your lifelong happiness.
Yours sincerely,
Li Ming

【答案解析】 这是一篇考查考生如何写信谢绝他人邀请的应用文。题目要求考生给朋友写信，表明无法参加婚礼。谢绝邀请信，在结构上，应力求层次明晰；在措辞上，要做到大方得体、不失礼貌。据此可谋篇布局如下：
第一段：对朋友的邀请表示感谢。
第二段：阐明不能出席婚礼的原因，并对不能出席表示歉意。
第三段：再次感谢邀请。并送上真诚的祝愿。