Sam is in Grade Three.Mary is in Grade Two.(合并成一句）

Sam is in Grade Three.Mary is in Grade Two.(合并成一句） he is in grade two .grade two大写不 he is in ____class four ,grade three He is in Grade Two this in,Tony,is grade,class,one,two Is Mary and her friend in grade two 这句话哪儿错了? ANDY AND SALLY [ ] IN CLASS TWO,GRADE THREE 括号中可不可以填IS Our sister is in Grade three否定句和一般疑问句和Grade Three划线提问 John is in Class two grade four 划线提问（划线部分为Class two grade fo what grade is mary brown in ?怎么回答? Mary is in Grade Seven(对seven提问) __ __ is Alice in this year?Grade Three.