[单项选择]Blue jeans are probably the single most representative article of American clothing．They were originally 26 by Jacob Davis，a tailor from Nevada， 27 ，together with dry-goods sales man Levi Strauss，patented the idea as 28 clothing for miners in l873．Blue jeans，also 29 as work clothing，spread among workers of all kinds in the late l9th and early 20th centuries， 30 among cowboys，farmers，loggers，and rail road workers．During the 1950s， 31 Marion Brando and James Dean made blue jeans 32 by wearing them in movies，and jeans be。came part of the 33 of teenagers’rebelling．In the l960sand 1970s，this fashion statement exploded as LevI’s 34 a fundamental part of the youth 35 focused on both civil rights and antiwar protests． 36 the late1970s，almost everyone in the United States wore blue jeans, 37 youths all around the world sought after them． 38 designers began to create more complicated 39 of blue jeans and to 40 their fit，jeans began to express the American emphasis 41 informality and the importan
A. Before
B. Since
C. By
D. Till

[单项选择]Blue jeans are probably the single most representative article of American clothing．They were originally 26 by Jacob Davis，a tailor from Nevada， 27 ，together with dry-goods sales man Levi Strauss，patented the idea as 28 clothing for miners in l873．Blue jeans，also 29 as work clothing，spread among workers of all kinds in the late l9th and early 20th centuries， 30 among cowboys，farmers，loggers，and rail road workers．During the 1950s， 31 Marion Brando and James Dean made blue jeans 32 by wearing them in movies，and jeans be。came part of the 33 of teenagers’rebelling．In the l960sand 1970s，this fashion statement exploded as LevI’s 34 a fundamental part of the youth 35 focused on both civil rights and antiwar protests． 36 the late1970s，almost everyone in the United States wore blue jeans, 37 youths all around the world sought after them． 38 designers began to create more complicated 39 of blue jeans and to 40 their fit，jeans began to express the American emphasis 41 informality and the importan
A. invented
B. introduced
C. developed
D. delivered