根据短文内容和首字母提示，在下文空格处填入适当的词使短文完整。(每空一词)
Millions of words about young American people’s ideas, feelings and actions have been w_▲_ over the years.
Today there are about seven million Americans in colleges and universities. Young people u_▲_twenty-five are nearly half of American people.
Many of these will soon be in charge of (负责管理)the nation. Naturally their ideas are i_▲_ to everyone in the country, and it is necessary for older people to understand what they t _▲_ and feel.
College students today have strong opinions about r_▲_ and wrong. They are deeply i_▲_ in making a better life for all people, e_▲_ for those who have not been given a fair chance before now. They see much that is wrong in the l_▲_ of their parents. It is h_▲_ for them to see what is right and good in the older ways. As a result, there is often t_▲_ in American families.