问题描述：
初一英语 填单词
A:What's that over there?
B:It's an eraser.
A:___that your eraser?
B:No,it isn't.___eraser is in my pencil case.
A:What's that over there?
B:It's an eraser.
A:___that your eraser?
B:No,it isn't.___eraser is in my pencil case.
问题解答：
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