In the United States the most popular form of folk dancing has been square—dancing since the earlier days．In those days，men and women worked in groups to build a house or harvest crops．When the work was done，they usually danced merrily and happily in a store or in a farm kitchen．
Nowadays square-dancing is still performed．A square，which has four sides，is formed by four couples．Each couple stands on one side of the square，the man on the left and the woman on the right．That is to say, one square has eight people and they stand facing the center of the square．
Large or small numbers of people can dance together．Sometimes as many as 800 or 1,000 people may be dancing all at the same time．
Costumes are worn by those who do the square—dancing．This makes the dancing more colorful to watch．Men may have colored shirts and western trousers they wear only on special days．Women often wear full skirts of different colors with a pretty blouse．In some country areas，everyone wears their best clothes．
Today in all parts of the US you will find some schools，clubs，or other groups that are square-dancing for fun．They enjoy it very much．
小题1: In the earlier days，when did people do square—dancing?(No more than 6 words)
 
小题2: How many people are square—dancing if there is one square?(No more than l word)
 
小题3: What does the underlined word“costumes’’mean in Paragraph 4?(No more than 8 words)
 
小题4: What do people in some country areas wear in square-dancing?(No more than 6 words)
 
小题5: How do people of the US like square-dancing today?(No more than 6 words)