What is the passage mainly about? A. The reasons for moving to the suburbs. B. The disadvantages of city life. C. The high cost of living in cities. D. The causes of pollution in cities.Đoạn văn6/25What is the passage mainly about? The reasons for moving to the suburbs. The disadvantages of city life. The high cost of living in cities. The causes of pollution in cities.Giải thíchB là đáp án đúng