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.