In recent years, playing kite-board seems to become more and more popular in Alaska in America. It is a new and old game. The game has w     the interest of many young people. The game is interesting but a little      [‘deɪndʒərəs]. One needs to play it very      (小心)
A kite-board is in fact a skateboard（滑雪板）drawn by a few big flying kites. The old game was p   by some young people in Holland and Spain as    (早的) as the last century. Since the board was hard to control,   people dared to play it. With the development of the design of kite and skateboard, many people can  [lɜ:n] how to play it. A kite board may go as f    as about 50 kilometers an hour. If you haven’t had any practice, you’d better not play it. It is not      (安全).
It is said that the game can exercise not only your    but also the sensitivity（敏捷） of your brain.