A．To tell how "high tech" and "state of the art" have developed. B．To give examples of "high tech". C．To tell what "high tech" and "state of the art" are. D．To describe very modem technology.
单项选择题Public interest lawyers serve （）
A．only stores and landlords B．criminals only C．people who can pay high fees D．people who can pay little or nothing
单项选择题The number of different languages spoken is about （）
A．150 B．1,500 C．5,000 D．4,000
