How long has the woman been a taxi driver

A．China switched from state planning and isolationism to reform and the open-door policy.
B．China applied to join GATT.
C．China began to negotiate with the US party in order to make the entry for GATT.
D．China decided to join the world' s principal trading body.

A．she owned a car
B．she drove well
C．she liked drivers' uniforms
D．it was her childhood dream