次の文章はA to Zというクイズのルールを説明したものの一部です。（　　）に入れるのに最も適切な語（句）を選びなさい。2点

   In this game there is a wheel with 25 letters of the alphabet (not Including "X").  The aim of the game is to complete the alphabet wheel by saying the correct word for each letter in five minutes.  The host gives the contestant (            ) for words starting with the letters, for example, "A---the place where you catch a plane" = "Airport."