By the first decade of the 21st century, international commercial air traffic is expected ______beyond today’s levels.

A．They are both adopting open-outcry trading practice.
B．They are both making efforts to modernize the trading practice.
C．They are competing in the oil trading market.
D．They are competing to take the largest share in world’s commodity trad

A．the needs of exceptional children are more important than their environment
B．the growth of exceptional children has much to do with their family and die society
C．the education of exceptional children mainly depends on the public schools
D．the society produces more influence on exceptional children than on normal children