【正确答案】 March 12
Dear Professor Brown,
We take great pleasure in inviting you to attend the party held by the English Corner on Friday night.
Being the founder of the English Corner, you are respected by all the students. Thank you for setting up the English Corner which provides us with a good environment to practice our oral English.
If you accept this invitation, please inform us. We will hold the party at 7:00 p.m. on Friday night.
Yours faithfully,
Helen