题目：
按要求改写下列句子。
1. This is my eraser. (改成一般疑问句)
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2. Can you write the word "chair"? (作肯定回答)
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3. It's a pencil case. (对划线部分进行提问)
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4. This is my table. (变成否定句)
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5. Sit down, please. (同义句转换)
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答案：
1. Is this your eraser ?
2. Yes, I can.
3. What's this (in English) ?
4. This is not / isn't my table.
5. Take your seat, please.
