Millions of words have been said about y

题目：

Millions of words have been said about young people in the United States. There are reasons   31        this great interest in their ideas,   32       (feel) and actions. Today there are about eight million Americans in the colleges and universities. The young under twenty-five make   33     nearly half of the American population, many of   34      will be in power in the U.S.   35           (nature) their ideas are important to everyone in the country, and    36         is necessary for the older people to understand  37           they think and feel. College students today have strong   38          (opinion) about right and wrong. They are deeply interested in making a   39          (good) life for all the people, especially for those   40     _____ have never been given a fair chance before.