Dear Mr.Wang,
Hello.I am writing to tell you what I did last Sunday.It was a fine day last Sunday.I went shopping at the bookstore with my deskmate Tom.We met at the school gate early that morning and went by bus.It took us about half an hour to get there.There were many students at the bookstore.I bought some reference books,story-books.They are useful for me.I like them very much.What a good day!
Regards
Yours