7 Numerous other commercial enterprises, from theaters to magazine publishers, from gas and electric utilities to milk processors, bring better and more efficiently services to consumers through the use of computers.
错误: efficiently services应该是efficient services. 这也是许多学生经常犯的一个错误。副词不能修饰名词,必须得改为形容词。
8 The American economic system is, organizing around a basically private-enterprise, market-oriented economy in that consumers largely determine what shall be produced by spending their money in the marketplace for those goods and services that they want most.
错误: organizing around a basically private-enterprise应该是organized around a basically private-enterprise.这里应该是过去分词来做一个伴随状语,而不应该是现在分词,因为它是主语的承受者。in that应该是in which.因为只有in which才能引导一个定语从句。in which=where, 在引导一个定语从句时,后面需要加上一个完整句。而in that只能引导一个状语从句=because.
9 Thus, in the American economic system it is the demand of individual consumers, coupled with the desire of businessmen to maximize profits and the desire of individuals to maximize their incomes, which together determine what shall be produced and how resources are used to produce it.
错误: which应该是that.与前面的it is构成一个强调句型。强调原句中的主语。
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