请完成下列句型转换。
1. I will go to Hong Kong by plane tomorrow afternoon. (对画线部分提问)
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2. Mary is going to leave here next Monday. (对画线部分提问)
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3. He will play football with his friends next Sunday. (对画线部分提问)
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4. They are going to spend their holiday in England. (变为一般疑问句)
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5. Tom is going to buy a birthday card for his mother. (改为否定句)
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