The United States is widely recognized to have a private economy because privately owned business play     1    roles. The American free enterprise system     2    private ownership more than public sectors. Private businesses produce     3    goods and services,     4    almost two-thirds of the nation's total economic output goes to     5    for personal use. The consumer role is     6    great, in fact, that the nation is sometimes characterized as having a "    7    economy".
    This emphasis     8    private ownership arises,     9    , from American beliefs about personal freedom. From the time the nation was     10    , Americans have     11    excessive government power, and they have sought to     12    government's authority over individuals—including its role in the economic realm.
        13    Americans generally believe that an economy largely with private ownership is likely to operate more     14    than     15    with substantial government ownership. When economic forces are unfettered, Americans believe, supply and demand     16    the prices of goods and services. Prices, in turn, tell businesses what to produce; if people want more of particular goods than the economy is producing, the price of the goods     17    . That catches the attention of new or other companies that,     18    an opportunity to earn profits, start producing more     19    that goods. On the other hand, if people want less of the goods, prices fall and less competitive producers either go out of business or start producing     20    goods. 
 
【正确答案】 B
【答案解析】 考查形容词辨析。空格处所在句意为:人们普遍认为美国是私有制经济,因为私营经济发挥了______作用。B.important“重要的”,符合句意,为正确选项。insignificant“无关紧要的”,magnificent“宏大的,庄严的”,respected“令人尊重的”,均不符合题意。