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最佳答案：There is a clock at the back of our classroom.
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最佳答案：He sits at the back of the classroom as usual.
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最佳答案：Teacher came into the classroom, following several students.Tom saw her singing
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最佳答案：where are you ?I am in the class.where are his parents?they are behind.the park
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最佳答案：Grade 6, Class 2an art classroomthirteen rubberstwenty studentsbehind this chair
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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