问题详情

Fran McCarthy"s question means: nobody ever thought that ______.
A．people who moved out of the city decades ago now would move back
B．suburban dwellers when moving back into the city must take round trip
C．suburban flight years ago would go in circles
D．senior people"s moving back into the city would take place all over the United States此题为多项选择题。请帮忙给出正确答案和分析，谢谢！