A．the other B．another C．others D．other one
单项选择题A professor of economic and history at Atlanta University, W.E.B. Du Bois, promoted full racial equality（）.
A．economy B．economics C．economical D．economic
单项选择题The earliest form of artificial lighting was fire, which also provided warm and protection（）.
A．hot B．sunshine C．warmth D．safe
