【正确答案】 Dear Tom,
I am going to study abroad in a few weeks and it is my great pleasure to invite you to come for the party that will be held at my house in the evening on Sunday. I hope you can come.
On that day, we can share the pleasant moment of the school days during the past three years together. Then, we can enjoy some drink and food. Lastly, I will ask you for some advice on studying abroad. Because your sister has stayed for one year abroad and she must have relevant experience.
Once again, I sincerely hope that you can come. I am looking forward to your arrival.
Yours sincerely,
Li Ming