What's Grade are you in?改错

What's Grade are you in?改错 Are you in Grade 7,Class 改错 What grade are you 为什么在what‘S your name?用what‘S 而what class /grade are you in用w what‘s grade are you in?这句的错误在哪,并改正. Are you in Grade what,in,grade,you,are连词成句 what class are you in?_________class tow,grade six. 改错:what are it in you bag? which grade are you in which grade are you in? Are you in grade four?