一封简单的英语道歉信

Question

假如你是李明，你刚从大学毕业，你以前高中的校长邀请你给学生做一次演讲。但因为那天你被指派课紧急的任务，不能如期参加。请写一封道歉信给张校长，早点如下：
由于不能按计划做演讲向校方道歉；解释取消演讲的原因；建议下次做演讲。

Answer 1

Dear Mr./Mrs.________
Thank you so much for inviting me to make a speak at this school, I am truly honored. But unfortunately there has been an emergency and I'm afraid I won't be able to make it. Again, I am so terribly sorry. I will be honored to do it if the chance ever comes around.
Sincerely, Ming Li.

我9岁去的美国， 觉得这样写挺好的。 简单而且意思到了。 强调你很抱歉