51（）

A.raw
B.primary
C.primitive
D.crude

Since the end of World War II, international trade has developed dramatically. All countries in the modern world join in worldwide trade, through which various sorts of merchandise and (51) materials arc exported in (52) for foreign currency, which means income wealth from (53) and job opportunity at home, and in the meantime, foreign goods are imported to provide consumers with (54) and welcome merchandise. Today, economic interdependence among countries is so (55) that no country can close its doors to the outside world, and the more prosperous the national economy, the more developed the foreign trade. Economic globalization is now a (56) in the world.

But in the past when old and new colonialism ruled the world there was no free and fair trade at all. Powers, (57) the British empire, the United States, Russia, Japan, divided the world into their spheres of influence—their colonies or dependencies, where their businessmen (58) their merchandise at high prices and bought (59) raw materials and labor at low prices. (60) of wealth flowed to these powers which then grew prosperous, (61) the colonies were driven into destitution (贫困). The national economy of colonies was innately defective. Their industries could not survive the overwhelming (62) of imports from the powers. Their monotonous national economy (63) in production of one or two agricultural crops or () products or minerals, to be sold in international market, for example, orange and sugarcane in Cuba, banana and coffee in South-America, coal in Poland, all (65) to supply-demand relation in world market under control of the powers. Even their customs were governed by officials from the powers, whose exported goods thus could enter the colonies nearly duty-free. It was after the collapse of colonialist system all over the world that free and fair international trade, at least theoretically, could be possible.