单项选择题
A．7 000 000. B．14000 000. C．Twice of the young persons under twenty-five. D．Not mentioned.
A．many of them will soon be in charge of the country B．older people are always trying to understand them C．they are active and interesting D．they always make trouble in families
A．make up nearly halt' of the American population B．are deeply interested in making a better life for all people C．have not been given a fair chance before now D．are always finding fault with their parents