【正确答案】[参考范文]
Dear David，
Jack is coming back from Shanghai to visit his parents this week and he has a week’s vacation before he returns to work．He said he would like to have a party with his old classmates，whom he missed very much．Will you come and have dinner with US on this Saturday，June 5th，at eight o’clock at the Big Mouth Restaurant，where we used to have parties．9
We will have a good time and we really hope you can come!