I very glad that you can invite me to go your home to eat dinner,but I am sorry that I can't go there because I will have a test the day after tomorrow,and I must prepare for it.The test is very important for me which decide my future road.So I want to eat dinner with you another day.When I have time,I will call you.I really hope you don't angry with me.If I have time,I will find you to tell sorry to you in person.I will appreciate it if you can excuse me.I wish you can have a good time sincerely.