The word Jeans comes from a kind of material that was made in Europe. The material called jeans was named after sailors from Genoa in Italy, because they wore clothes made from it. In the 18th century jean cloth was completely from cotton and workers at that time love wearing it because the material was very strong and it did not war our easily. In the 1960s, many university and college students wore jeans. Designers made different styles of jeans to match the 1960s’ fashion. In the 1970s more and more people started wearing jeans because they became cheaper. In the 1980s jeans finally became high fashion clothing, when famous designers started making their own styles of jeans, with their own labels on them. Sales of jeans went up and up . But in the 1990s the worldwide economic situation got worse , and the sale of jeans stopped growing. However jeans have never been out of fashion, and today young generation is still fond of wearing them. 17. What is the main idea of the passage? A. The development of jeans B. Sailors from Genoa in Italy C. The sale of jeans D. The designers of jeans 18. The word “it“ in line 3 refers to. A. material B. clothes C. cotton D. cloth 19. In line 4, the word “wearing” can be replaced by. A. putting on B. calling on C. turning on D. going on 20. Which of the following statements is NOT mentioned? A. In 1980s, jeans have been out of fashion. B. Designers made different styles of jeans. C. In 1960s many students wore jeans. D. Jeans were made from a kind of material. 21. The author implies that .................. A. Jeans have never been out of fashion. B. Jeans have ever been out of fashion. C. Jeans have just been out of fashion. D. Jeans have already been out of fashion. please help meee