what class are they in?

what class are they in? What class are they having .--- What class are they in --- They are in _______ .A.Grade What class are you in? What class are you in 根据所给单词填空（ ）（ ) ( )they ( class,in,what,are They are in different class 改错 They are in the same class.变形 in ,they ,three,class,are.组成一句话. Are they in the same class －What class are you in,Mike? What class are you in?后一句是什么