此题要求改正所给短文中的错误。对标有题号的每一行作出判断：如无错误，在该行右边横线上画一个钩（√）；如有错误（每行只有一个错误），则按下列情况改正：
此行多一个词：把多余的词用斜线（/）划掉， 在该行右边横线上写出该词，并也用斜线划掉。
此行缺一个词：在缺词处加一个漏词符号（/\），在该行右边横线上写出该词。
此行错一个词：在错的词下面划一横线，在该行右边横线上写出改正后的词。
原行没有错的不要改。
A person’s age no longer tells you something about 1．________
his social position, marriage or healthy. There’s no longer, 2．________
a particular year which one goes to school or goes to 3．________
work or gets married or start a family. The social clock 4．________
that keeps us on time and tells us when go to school, get 5．________
a job, or stop working isn’t as strong as it was used to be. 6．________
It doesn’t surprise us to hear a 28-year-old university 7．________
president or a 35-year-old grandmother, or 70-year-old 8．________
man who has become a father for the first time. What we 9．________
all know, public’s ideas are changing nowadays. 10．________