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.
C.
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.
In the United States, the first day nursery was opened in 1854. Nurseries were established in various areas during the (1) half of the 19th century; most of (2) were charitable. Both in Europe and in the U. S. , the day-nursery movement received great (3) during the First World War, when (4) of manpower caused the industrial employment of unprecedented numbers of women. In some European countries nurseries were established (5) in munitions (军火)plants, under direct government sponsorship. (6) the number of nurseries in the U.S. also rose (7) , this rise was accomplished without government aid of any kind. During the years following the First World War, (8) , Federal, State, and local governments gradually began to exercise a measure of control (9) the day nurseries by (10) them and by inspecting and regulating the conditions within the nurseries.
B.
The (11) of the Second World War was quickly followed by an increase in the number of day nurseries in almost all countries, as women were (12) called upon to replace men in the factories. On this (13) the U. S. government immediately came to the support of the nursery schools, (14) $6,000,000 in July, 1942, for a nursery school program for the children of working mothers. Many States and local communities (15) this Federal aid. By the end of the war, in August, 1945, more than 100,000 children were being cared (16) in day-care centers receiving Federal (17) Soon afterward, the Federal government (18) cut down its expenditures for this purpose and later (19) them, causing a sharp drop in the number of nursery schools in operation. However, the expectation that most employed mothers would leave their (20) at the end of the war was only partly fulfilled.
Advances in computers and data networks inspire visions of a future " information economy" in which everyone will have (1) to gigabytes of all kinds of information anywhere and anytime. (2) information has always been a (3) difficult commodity to deal with, and, in some ways, computers and high-speed networks make the problems of buying, (4) , and distributing information goods worse (5) better. The evolution of the Internet itself (6) serious problems. (7) the Internet has been privatized, several companies are (8) to provide the backbones that will carry traffic (9) local networks, but (10) business models for interconnection--who pays how much for each packet (11) , for example--have (12) to be developed. (13) interconnection standards are developed that make (14) cheap and easy to transmit information across independent networks, competition will (15) . If technical or economic (16) make interconnection difficult, (17) transmitting data across multiple networks is expensive or too slow, the (18) suppliers can offer a significant performance (19) ; they may be able to use this edge to drive out competitors and (20) the market.