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最佳答案:lackbord
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最佳答案:There is black blackboard in the classroom.
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最佳答案:oard
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最佳答案:There is a blackboard in the classroom.
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最佳答案:Let's look at the blackboard.
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最佳答案:there is a blackboard in the front of the classroom
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最佳答案:a blue coata red hat 或者a red capa blackboard关键是注意名词前一定要有a 或者an(你们老师一定讲过)