Traffic restrictions have come into effect in Beijing to improve the
capital’s air quality and traffic situation for the 2008 Olympics．
A．in order that B．in an attempt C．at an attempt D．in a try
Traffic restrictions have come into effect in Beijing to improve the
capital’s air quality and traffic situation for the 2008 Olympics．
A．in order that B．in an attempt C．at an attempt D．in a try
B
in an attempt to do sth努力尝试做某事。