英语作文开头的高级问候句型包括：
How is it going？
I am glad to receive your letter.
You asked me about （+problem question）, now let me give you some advice.
It has been a long time since I got your last letter.
I'm sorry I took so long to reply.
I have been so busy recently that I...
How are you getting along these days？ I miss you very much.
How is everything？
I hope everything is all right.
How are you？
What's up？
It's nice to meet you.
It's nice to see you again.
这些句型可以根据具体情境选择使用，以表达不同的情感和礼貌。例如，如果你已经很长时间没有收到对方的来信，可以使用“It has been a long time since I got your last letter.”来开头，表达思念之情。如果你刚收到对方的来信，则可以用“I am glad to receive your letter.”来表示对对方的重视和感谢。