You will never imagine that such a small invention as a kite can       （有益） us so much! Flying kites is a popular hobby in many countries of the Far East where
      （漂亮） decorated kites appear    different colors．In China there is a special Kites Day on which children anda      fly kites together happily．A flat kite is the oldest and        (简单的) type of kite．It flies b      air flows over and under the kite's wing．The pressure under the wing helps the kite lift into the air．Kites have also       used in experiments．Early scientists s            kites up into the air to measure temperature at different        （高度）. Kites were also used to develop airplanes．       is known to us that the Wright Brothers experimented with kites before they flew the first airplane．