朋友答应看你但是因为考试不能去一篇英文道歉信

June 16th, 2011
Dear XXX,
I’m writing this note to apologize to you that I can’t visit you at the appointed day. I know that you must feel great disappoint. The fact is that my teacher arranged an examination for our class which needs lots of time to prepare it. I am really sorry for the trouble and I hope that this does not cause you too much inconvenience. Please accept my sincerely apology.
Yours truthfully,
XXX

I'm sorry . I don't kown