TOEFL Reading: ETS-TOEFL阅读机经 - DPF38XUGY37LHF6NL$

Paragraph 5 suggests that the large-scale migration to cities resulted in which of the following? A. After two generations in the cities, migrants returned to agricultural life. B. The overall population in Europe declined. C. Farmers worked in cities, and their families worked the land. D. Cities contained large numbers of people who were unemployed.