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根据下面资料，回答题 The United States leads all industrial nations in the proportion of its young men and womenwho receive higher education．Why is this? What motivates a middle-income family with twochildren to (21)_________ loans for up to $120,000 so that their son and daughter can(22)_________private universities for four years? Why would both parents in a low-income familytake jobs to support their three children at a state university each (23)_________an annual cost of$4,000? Why should a woman in her forties quit her job and use her savings to (24)_________for the college education she did not receive when she was (25) _________?Americans place a high personal value (26)_________ higher education．This is an attitudethat goes (27)_________ to the country' s oldest political traditions．People in the United Slateshave always believed that education is necessary for (28)_________a democratic government．They believe that it prepares the individual (29)_________ informed intelligent, political participation, including voting．
Before World War II, a high school education seemed adequate for (30)_________ most people's needs, but the post-war period produced dozens of new questions for Americans．How should atomic (31)_________ be used? Shouldscientists be (32)_________to experiment in splittinggenes? Should money be spent on (33)_________ astronauts into space---or should it be used foraid to another nation? Americans rarely express a direct vote on such complex matters, but the representatives they elect (34) _________decide such issues．In recent years, (35) _________a resultmany Americans have begun to regard a college education as necessary to becoming an informedAmerican voter．
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