句型转换。
1. Is this a box? (改为复数句子)
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2. What's that? (用egg回答)
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3. Steve is eleven. (对画线部分提问)
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4. Amy is in Class Two. (对画线部分提问)
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5. Those are erasers. (改为一般疑问句,并作否定回答)
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