Dear John,

Thank you for your invitation to dinner at your home tomorrow evening. Unfortunately, it is much to my regret that I cannot join you and your family, because I will be fully occupied then for an important exam coming the day after tomorrow. I feel terribly sorry for missing the chance of such a happy get-together, and I hope that all of you enjoy a good time. Is it possible for you and me to have a private meeting afterward? If so, please don’t hesitate to drop me a line about your preferable date. I do long for a pleasant chat with you.

Please allow me to say sorry again.

Yours sincerely

Li Hua

题目分析：考查应用文中的书信的写作。假如你是李华，因不能赴约去你朋友John 家共进晚餐，因为你将忙于准备后天的一门重要考试，据此用英语写一封致歉信。要点都已经给出，书信类短文的关键在于要点要全面包括，不能有遗漏和省略。但是要点只是提纲，考生还要在此基础上增加细节，不要逐字逐句翻译，同时注意谋篇布局的顺序，运用合适的连接词连接全文，同时选择高级的词汇和语法项目让文章更有文采。审题时注意本文使用一般现在时，描述要尽量选择简洁的语言，运用合适的语法规则和词汇把各要点都准确表述出。难点在于选择词汇和句型，可以灵活运用高级词汇和固定短语准确表述。还要用适当的连接词被句子连接起来，这样文章显得更连贯。

【亮点说明】it is much to my regret that I cannot join you and your family, because I will be fully occupied then for an important exam coming the day after tomorrow. 这句话用了强调句和原因状语从句，I feel terribly sorry for missing the chance of such a happy get-together, and I hope that all of you enjoy a good time. 这句话用了并列句和宾语从句，Is it possible for you and me to have a private meeting afterward? 这句话用了it做形式主语，If so, please don’t hesitate to drop me a line about your preferable date.这句话用了省略， I do long for a pleasant chat with you.这句话用了强调谓语动词。