简单句偏多了;文中用词稍显贫乏,另外请注意单词拼写的检查;不能熟练使用过渡词,文章结构不严谨。
Dear John, I'm so sorry for that I can't go to your home eating dinner with you.Because I was prepare for a important exam after the day.Thanks for your invition.I'm sorry that i can't keep the appoitment. You can call me if you have free time.We should have a date again. Please don't angry with me.I was looking forward your reply! Have a nice day! Your sincerely, Lihua.