Reference versions: o She came into the classroom with some books in her arm.她走进教室，腋下夹着几本 书。 o Machines work on electricity.机器靠电来运 转。 o Without plants,life could not go on.没有植 物，生命就无法继续。 o At the meeting,some were for the proposal and others against it.会上，有的 赞成这一建议，有的反对这一建议。 (Sun P81)Reference versions:  She came into the classroom with some books in her arm.她走进教室，腋下夹着几本 书。  Machines work on electricity.机器靠电来运 转。  Without plants, life could not go on.没有植 物，生命就无法继续。  At the meeting, some were for the proposal and others against it.会上，有的 赞成这一建议，有的反对这一建议。  （Sun P81）