Mike: Good morning, Su Hai.
Su Hai: Good m, Mike.
Mike: W that in your bag?
Su Hai: It's a carton(盒子) of m. Would you like to d some?
Mike: N, thank y.
Su Hai: Is this y rubber?
Mike: No, M rubber is white. This is your rubber, Su Yang.
Su Hai: Shh! Don't t in the library, Mike.
Mike: I'm s.