单项选择题
A．on B．in C．off D．onto
A．the adolescents now become timid B．parents come to get along with their children C．the vast majority of teenagers share most of their parents’ values and ideas D．parents and teenager don’ t like to quarrel
A．Very small pieces of food are put on the floor. B．Some of it is put into tubes. C．Small-sized cookies are packed in plastic. D．Both B and