During the 1980s, unemployment and underemployment in some countries was as high as 90 percent. Some countries did not【C1】______

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问题 During the 1980s, unemployment and underemployment in some countries was as high as 90 percent. Some countries did not【C1】______enough food; basic needs in housing and clothing were not【C2】______. Many of these countries looked to the industrial processes of the developed nations【C3】______solutions.
【C4】______, problems cannot always be solved by copying the industrialized nations. Industry in the developed nations is highly automated and very【C5】______. It provides fewer jobs than laborintensive industrial processes, and highly【C6】______workers are needed to【C7】______and repair the equipment. These workers must be trained,【C8】______many nations do not have the necessary training institutions. Thus, the【C9】______of importing industry becomes higher. Students must be sent abroad to【C10】______vocational and professional training.【C11】______, just to begin training, the students must【C12】______learn English, French, German, or Japanese. The students then spend many years abroad, and【C13】______do not return home.
    All nations agree that science and technology【C14】______be shared. The point is, countries【C15】______the industrial processes of the developed nations need to look carefully【C16】______the costs, because many of these costs are【C17】______. Students from these nations should【C18】______the problems of the industrialized countries closely.【C19】______care, they will take home not the problems of science and technology,【C20】______the benefits.
【C16】

选项 A、to
B、at
C、on
D、about

答案B

解析 发达国家的工业进程的国家必须仔细看清楚成本,因为这些成本很多都是隐形的。所以选B)。
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