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.penB.tailC.ruler
(2) A.tiredB.boredC.visited
(3) A.themB.himC.he
(4) A.teacher B.olderC.taller
(5) A.onB.anC.in
(6) A.wentB.gotC.when
(7) A.firstB.fourC.fifteen
(8) A.tigerB.dogC.do
(9) A.whenB.canC.what
(10)A.usually B.oftenC.off