单项选择题
A.Slowly B.Consequently C.Rarely D.Occasionally
A.will always benefit those who rent apartments B.is unnecessary C.will bring negative effects in the long run D.is necessary under all circumstances
A.To persuade people to stop polluting the air. B.To tell the causes of air pollution. C.To tell why cities are bad places to live. D.To describe why cities are bad places to live.