根据括号内的要求改写句子,注意标点符号。
1. My mum is at the supermarket. (就画线部分提问)
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2. He’s listening to music. (就画线部分提问)
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3. Simon is making a birthday card for Daming. (改为一般疑问句)
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4. Are all the balloons flying away? (做否定回答)
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5. down, the, apples, the, stairs, are, falling. (连词成句)
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