Look in the bedrooms of young people in the world. Maybe you will find a pair of blue jeans in each room. Jeans are very popular all over the world. Jeans give you the feeling of comfort , youth and energy . Every person likes them very much. Levi Strauss is an American company. It first made blue jeans. The company was founded  in 1853 by 24-year-old Levi Strauss. Twenty years later, he made first blue jeans in the world. The jeans were used as working trousers for the cowboys  of American West. During the Second World War, American soldiers brought blue jeans to Europe and Asia. People there began to wear jeans. Little by little, they become cool. People from different countries like different styles of jeans. Americans like to wear simple and single-colored jeans, but many Chinese people like to wear jeans with lots of different colors. Now we can see jeans everywhere. However, in many places, it's not always good to wear jeans. No matter how good they may look, or what color they are, it's often not right to wear jeans in formal  places. But when you are out, relaxing or having fun, jeans are the best choices. When you  _  , you'd better not wear a pair of jeans.
go to an important meeting go to a trip have a party are having fun