invitation to a professor Dear professor, I, chairman of the Student Union, am highly delighted to invite you to our graduation ceremony held for the postgraduate. Here are some details. First and foremost, the ceremony is to be held at the first meeting room from 2 p.m. to 5 p.m. on December 23, 2019. Furthermore, we are quit cheerful if you can deliver a sppech on the topic about how to live a better life based on your expertise. I am looking forward to our arrival. I f you accept the invitation, please inform me of your time of the arrival, so that we can make neccessary arrangement.