Dear Tony：
Thanks for your(邀请). I'm sorry I can't go to your house（在）Saturday afternoon. I will take a vacation on Saturday and Sunday （和）my friends. On Monday, I will study for my science test. On Tuesday, I'm going to my (叔叔的)house to visit him. On Wednesday, I have to (照顾)after my grandfather—he （是）very old. On Thursday, I will (帮助) my parents do some housework. And I have （一） art lesson on Friday afternoon. On Friday evening, I would （想要）to go for a walk with my brother （在）the park. Can you come and join us?
Write soon,
Jessica
