The class ________ into three groups.
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"答案A

把一个整体分成若干部分用divide sth.into… divide和 separate都有“分”的意思,但用法有所不同.divide指把整体分为若干部分.separate指把原来联合在一起或靠近的人或物分离开来.试比较:The apple was divided into two.苹果被分为两半.Ten divided by two is five.十除以二得五.In the US,the blacks and the whites were no longer separated in public places.(= In the US,the blacks were no longer separated from me whites in public places.)在美国,黑人和白人在公共场所不再隔离了."