Grade six 用什么介词?

grade 前用什么介词 高一六班用英语怎么说Class Six Grade 什么.. Grades six还是grade six?grade作等级讲用复数吗?我的课本上写着grades six to gra I am in Grade Six.划线部分提问.Grade Six There are six classes in Grade One ,这个句子什么结构 I'm in class three grade six.(用英语怎么问) Daming ______ ______ Class One ,Grade Six Are you a student of Grade Six? l am in Grade Six （划线部分提问）grade six划线 i have worked harder than before ( ) grade 7加什么介词 六、用所给词的适当形式填空.3、Are Peter and Tom in Six (grade) The teachers in our grade are very good-- us.用哪个介词,为什么