They are orange schoolbag改为单数句,怎么改啊!

They are orange schoolbag改为单数句,怎么改啊! they are orange sweaters 改为单数句 they are orange schoolbags改为单数句 They are some good dictionaries.改为单数句怎么改 你好、Are they student 改为单数句怎么改? 把they are boxes.改为单数句怎么改 They are orange trees 怎么改为单数句 这是明早作业, those are orange towels改为单数句 改为单数句:Those are orange oranges. Are these orange quilts?改为单数句 ther are orange butterflies改为单数句 those are orange jackets改为单数句