Hi Goby，
Thanks for your invitation. I’d love to. But I am very sorry. I can’t visit you this weekend. I am really busy. On the Saturday morning, I have to help my mom to clean the home. And I have to do my homework in the afternoon. There too much homework this weekend. On Sunday, I have to study for the test. So, I can only say sorry to you now.
Write soon.
Karin