[题目]选出不同类的一项.[1]A.dancerB.driverC.teach[2]A.teachB.learnC.teacher[3]A.wasB.amC.is[4]A.nowB.thenC.at[5]A.MathsB.ScienceC.thirty[6]A.ChineseB.EnglishC.class[7]A.studyB.hardC.read[8]A.makeB.wroteC.studied