选出下列每组单词中与其它两个不同类的一项。
(1)A.cheese B.water C.milk
(2)A.went B.watch C.met
(3)A.enough B.beautiful C.hour
(4)A.cakes B.meat C.eggs
(5)A.flute B.football C.basketball
(6)A.pen B.bag C.postcard