选出不同类的一项。
(1)A.bike         B.bus          C.school
(2)A.by           B.in           C.the
(3)A.afternoon    B.in           C.morning
(4)A.home         B.school        C.bike
(5)A.foot         B.come         C.go 
(6)A.how          B.what         C.by