高考英语书信作文的万能开头和结尾如下：

开头

I am writing to express my gratitude for...

I am writing to inform you that...

I am writing to request information about...

How nice to hear from you again.

I’m very pleased to hear from you.

I’m too glad to receive your letter.

结尾

Please remember me to your whole family.

Give my best regards （wishes） to your mother.

Best wishes.

With love.

Wish you a pleasant journey.

Wish you success.

Wish you the best of health （luck）.

Looking forward to your next visit to China.

Looking forward to...

这些开头和结尾的句子可以帮助你快速构建一封结构完整、表达清晰的书信作文。希望这些信息对你有所帮助!