Lesson 101 Simon 's never careless, but Billy...!

Miss Williams: Here's your exercise-book, Billy.
Miss Williams: You're often careless. Look at these mistakes!
Miss Williams: Don't laugh at Billy, Sandy!
Miss Williams: Whose is this exercise-book?
Billy: It's Sandy's, Miss Williams.
Miss Williams: Sandy, put your name on the cover. You are sometimes careless, too!
Miss Williams: Look at Simon's exercise-book. Simon's never careless. His work is always neat and tidy. Billy! You naughty boy!