按要求改写下列句子
This is my eraser.  (改成一般疑问句)
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Can you write the word "chair"? (作肯定回答)
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It’s a pencil case. (对划线部分进行提问)
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Tiffs is my table. (变成否定句)
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Sit down, please. (同义句转换)
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