找出不同类的单词,并将其字母编号写在前面的括号里。
(1)A.pen B.tail C.ruler
(2)A.tired B.bored C.visited
(3)A.them B.him C.he
(4)A.teacher B.older C.taller
(5)A.on B.an C.in
(6)A.went B.got C.when
(7)A.first B.four C.fifteen
(8)A.tiger B.dog C.do
(9)A.when B.can C.what
(10)A.usually B.often C.off