betty is on duty today.she is c--- the blackborad with an er

问题描述:

betty is on duty today.she is c___ the blackborad with an eraser.
1个回答 分类:数学 2014-10-02

问题解答:

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cleaning擦黑板
如还有不懂的,还可以继续追问哦\(^o^)/~
 
 
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