【单选题】听力原文:F: Tom, do you think that it is right for us to group people by age? I mean we put our three-year-olds together in day-care centers, our 13-year-olds in schools and sports activities, and our 80-...
A.
Put our three-year-olds together in day-care centers.
B.
Put our 13-year-olds in schools and sports activities.