单项选择题
[听力原文] M: You’re going to Chicago tomorrow. aren’t you W: Yes. I thought I’d fly, but then I decided that taking a bus would be cheaper than driving or flying.
A.By plane. B.By car. C.By train. D.By bus.
A.the strict control of information B.the rapid technological advances C.the complete isolation of the poor D.the existence of mainstream society