an apology letter

Dear Peter,
My apology.Peter, I'm sorry for that I can't didn't reply to you until now.  at time. One A week ago you asked me something about the plan in my coming summer vacation plans, but I was preparing for an important exam. I almost have spent almost all of my time and energy to it studying, and I did my best not to fall through quit. I had my head so buried my head into my books that I didn't even have any time to check it until I saw your  my email until today. That being said, Drawing our attention to my comlete plan now. In fact, I don't have a compelte plan or interesting any ideas yet about vacation. If you get a idealplease tell me  think of something that would be fun for us to do, let me know.

   Yours,  XXXX

I'm not sleepy.....

It's already 1:23, but I'm not sleepy.
I shouldn't have taken a nap.
I'm thinking of drinking Sake.

I know what you mean. I try to not lose what they are trying to say....focusing on the obvious mistakes. I try to think of how I feel when I'm learning Spanish. Don't rewrite my thoughts---tell me how YOU would say it.

Your sentence is grammatically correct, especially by separating a lot instead of saying alot. Good job. "Camping can cause kids to miss their families a lot" could also be written: Kids sometimes miss their families when they go camping. (depending on who is going camping!) :)

 About a game I have been playing for several months

Several months ago, when I was  while surfing the Internet by using on my smart phone connected to the mobile network, an app recommended a game named "Clash of Clans" which caught my attention. was recommended by an App attracted me. The short video advertisement demonstrated cute buildings, funny roles and interesting playing rules. Therefore, I started playing this game immediately from then on, and now I am stilling a little addicted to it. This game Clash of Clans has gained popularity among a plethora of people all over the world since it is on  in the top ten of the game list in of the Apple Store game list. Therefore, I believe some fans of this game might be here and active in "italki". If you are, and do not yet belong to any other clan, you are welcome to join my clan in the game.
Any correction will be appreciated. Thank you!

It is better to say: "Make friends with someone who has similar hobbies as you."

yes, "I haven't gone camping" is a perfectly used grammar.