下列题中各有一处错误,请把正确的句子写在横线上.they are in different class.
问题描述：
下列题中各有一处错误,请把正确的句子写在横线上.they are in different class.
答
They are in different classes.
答
classes
答
they are in different classes.他们在不同的班级.所以班级应用复数.