请指出下列各组含有不同发音字母的单词
()1.A.comeB.usC.tooD.work
()2.A.veryB.eightC.zooD.yes
()3.A.rowB.stopC.wrongD.sun
()4.A.sayB.oldC.openD.knok
()5.A.weekB.todayC.whatD.he