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最佳答案：They are always aware of the fact that they are burdened with the important task
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最佳答案：Please don't write on the blackboard
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最佳答案：tow boad
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最佳答案：sweep the flooropen the windowclose the windowturn on the lightturn off the ligh
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最佳答案：The desk is in front of the blackboard.Mary faces to the blackboard.I sat at the
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最佳答案：10th Septembe
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最佳答案：1.用粉笔在黑板上写 write on the blackboard with chalk2.把……发送给某人 send...to sb.3.通过邮件把家庭作业