请选出各小题中不属于一类的词,并将字母标号填在括号内。
(1)A.bike B.subway C.stop D.plane
(2)A.north B.south C.east D.buy
(3)A.play B.watch C.find D.post office
(4)A.actor B.singer C.traffic D.writer
(5)A.rain B.cloud C.stream D.bike