【正确答案】July 15, 2012
Dear Professor Brace,
I am very sorry for having missed your last lecture for I had to stay in bed due to a high fever that day. I hope I can do something to compensate for the loss of missing that lecture and I would be very happy to get your advice on that lecture at any time at your convenience. Again, I really feel sorry for missing your lecture.
Sincerely yours,
David Green