Jeans have become one of the most worn pieces of clothing in the world．Everybody wears them，from the rural farmer to the urban lawyer and from models to housewives．But why have jeans become so popular.You’Ⅱget many answers．For some people they look cool，for others 1cans are simply comfortable．
Jeans were first designed as trousers for farm workers and miners in the states of the American west．A Nevada tailor，Jacob Davis，had the idea of using copper bolts(铜制铆钉)at the Corner of the pockets to make them stronger. They became popular at once and soon many people bought them．
At first j cans were worn only by workers，especially in factories．In the east of the US jeans were hardly worn at a11． But when rich easterners went on holidays to escape everyday life they often put on jeans．
James Dean．and Marion Brando made them popular in movies and everyone wanted to wear them．The new trousers were once not allowed to wear in American schools and sometimes in theatres and cinemas．But as time goes on jeans have become more acceptable and today they are worn not only as ordinary clothes but also at formal events．
Other countries quickly started to get used to wearing jeans too Americans in Europe and Japan often wore them when they were not on duty to show that they were Americans．The trousers showed the world a．Happier way of life，something that people needed．．Today jeans are an important part of our lives．
29．Jeans were first made for _____
A.farm workers
B.urban lawyers
C. models
D. housewives ．
30．From the third paragraph we can learn______
A.at first jeans were worn only by factory workers
B.．workers in the east of the US liked jeans better
C. rich easterners liked doing farm work in jeans
D．the people in jeans in the east of the US were mostly rich
31．Which of the following helped make jeans popular according to the passage?
A.Movies． B.．Schools．
C．Newspapers． D. Japanese