an apology letter
Dear Peter
My apology.Peter, I'm sorry for I can't reply you at time. One week ago you asked me something about the plan in my coming summer vacation. But I was preparing for an important exam. I almost spend all of my time and energy to it. I did my best not to fall through. I buried my head into books.I didn't even have any times to check it until I saw your email today. Drawing our attention to my complete plan now. In fact, I don't have a compelte plan or interesting ideas yet. If you get a idea,please tell me.
Yours XXXX