【正确答案】[范文]
April, 2
Dear John,
I really feel sorry for my carelessness today. If I've offended you please do forgive me, you know I'm not intentional. I here apologize for any disturbance and inconvenience I've brought to you. I will try my best to make it up. You are always being so magnanimous. Give me a chance and I will appreciate your kindness.
Yours sincerely,
Tom

【答案解析】[审题]
根据该部分给出的提示，可知便条内容是要向朋友表达自己的歉意：
1．注意格式，开头交代时间、称呼，结尾落款。
2．在正文中首先要表达自己的歉意，交待原因，强调自己不是有意冒犯。对于给对方带来的伤害深表遗憾，并且会弥补过失，最后请求对方原谅自己。语气一定要真诚，态度要诚恳。