单项选择题
A．they are aged B．they find it hard to accept modern things C．they take their standards of perfection from the Greek D．they look at things by the standards of the past
A．barriers B．ignorance C．disability D．prejudice
A．There were more crimes. B．Cities were in a bad condition. C．Only one mass transit system was completed. D．Some small companies move in while larger ones moved out.