要点： 1. 谢绝Paul的邀请；2. 说明你的理由；3. 推荐你的同学Anna参加

【答案】

Dear Paul,

Thank you very much for your invitation.

I’d love to accept it and take this opportunity to introduce traditional Chinese painting to foreign friends, but I’m sorry to inform you that I can’t. My grandpa is seriously ill in hospital and I have to look after him. As for the introduction speech, I strongly recommend my friend Anna, who is the most suitable choice, to take my place next Sunday. She began to learn painting at an early age and has a broad knowledge of traditional Chinese painting, which, combined with her active personality and perfect spoken English, will help make your activity a success.

Sorry again for any inconvenience caused by my absence and all the best wishes to you.

Yours,

Li Hua

【解析】

试题分析：本文是篇书信，要根据三点要求来完成，分别是 1. 谢绝Paul的邀请；2. 说明你的理由；3. 推荐你的同学Anna参加，写作时要注意以下几点：1、写作内容涵盖所有要点，不可遗漏；2、要运用恰当的语气，委婉的表示拒绝，注意时态语态，避免出现语法和拼写错误；3、适当运用高级词汇和句型来为自己的文章增色。

【亮点说明】文章要点齐全，表达思路明确，知识点运用恰当到位，文中使用了非常好的短语和词汇为文章增色不少，比如opportunity，introduce to，inform，look after，take my place，has a broad knowledge of等。还运用了一些从句使得文章结构更加严谨合理，如I strongly recommend my friend Anna, who is the most suitable choice, 是定语从句，She began to learn painting at an early age and has a broad knowledge of traditional Chinese painting, which, combined with her active personality and perfect spoken English非限制定于从句，也是一句长句等。并注意了委婉语气的使用I’m sorry to，Sorry again表达了自己诚恳的抱歉之意。