Dear Mike,
How about coming to Susan's eleventh birthday party this afternoon? Now Amy, Peter, John and I are at Susan's home. We are helping Susan prepare (准备) the food for her party. There are oranges, bananas and hamburgers on the table. Oh, I also see ice cream. It is your favorite. The party is at 3:00 in the afternoon. When you come, please take my guitar with you. It's in the bookcase in my room. If you can't find it, just call me.
Yours,
Sonia