There are four kinds of things on the platform,a bicycle key,a pair of sunglasses,a hair band,newspaper,whose are these things?We only know that in this class,Alice liks reading newspaper,Jack often rides a bike to school,Kathy hates sunshine,she likes to be cool,Lillian has long hair,Maris hates with these tips we can conclude that:the newspaper is Alice's,not Maris,the bike is Jacke's since only he ride a bike to sunglasses is Kathy's cause the sunglasses can help her to prevent her eye from being basked by the sunshine,also wearing a pair of sunglasses will be cool in hair band is Lillian's cause Lillian can use the hair band to prick her long hair.