选出与其他三个不同类的单词。
( )(1)A. Bus B. Ship C. Bike D. book
( )(2)A.red light B.traffic light C.yellow light D.green light
( )(3)A. Beijing B. Canada C. England D. go
( )(4)A. stop B. go C.wait D. light
( )(5)A.morning B.afternoon C.evening D.week
( )(6)A.boy B.cat C.dog D.elephant