Girl 1:Whose volleyball is this?
Boy: It must be Carla’s. She loves volleyball.
Girl 1: How about this toy truck?
Girl 2: Hmm…that toy truck must belong to Jane’s little brother. He was the only little kid at the picnic. And the magazine must belong to Deng Wen. He loves rabbits.
Boy: Oh, look, someone left a book.
Girl 2: That book must be Mary’s．J.K. Rowling is her favorite writer.
Girl 1: OK…and how about this CD?
Girl 2: Hmm…The CD must belong to Grace. She always listens to pop music.