选出与其他三个不同类的单词。
( )(1)A. BusB. ShipC. BikeD. book
( )(2)A.red light B.traffic lightC.yellow light D.green light
( )(3)A. Beijing B. Canada C. EnglandD. go
( )(4)A. stopB. goC.waitD. light
( )(5)A.morning B.afternoon C.eveningD.week
( )(6)A.boyB.cat C.dog D.elephant