Flags have existed for over 3000 years. The earliest flags were wooden or metal poles topped with a carving. About 2000 years ago pies of fabric were added to some poles for decoration. Over the next 500 years the free-flying part of the flag became more important. Every country today has its own flag. Many groups and organizations also have a flag which stands for, or symbolizes, the aims of the group. The flag depicts (描绘) a world map, centered on the north pole. The map is surrounded by an olive (橄榄) wreath (花环) symbolizing peace and co-operation. The flag is blue and white. 小题1:Flags have been in existence for _________. A．500 years B．more than 3000 years C．about 2000 years D．between 500 and 2000 years 小题2:A very old flag is likely to _________. A．be made of fabric B．have a map on it C．have white shapes on it D．be made of carved wood 小题3:An olive wreath is used to stand for _________. A．peace B．purity C．justice D．equality