高中英语作文写信开头

高中英语作文写信开头可以采用以下几种方式：

I am writing to express my gratitude for your kind support.

I am writing to inform you that I have successfully completed the project.

I am writing to request information about the upcoming event.

I am looking forward to your reply and hope to hear from you soon.

I am writing to invite you to join us for the celebration event.

How nice to hear from you again! I hope this letter finds you well.