按要求改写句子：

1. Please turn off the light. （改为否定句）

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2. I know his telephone number. （改为一般疑问句）

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3. It is a fine day today. （改为感叹句）

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4. The children have school today. （改为否定句）

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5. I’d like to join them.（改为一般疑问句）

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6. They are going to see a film tomorrow. （对画线部分提问）

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7. I like collecting stamps and singing. （改为否定句）

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8. He often cleans his bedroom. （改为一般疑问句）

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9. My mother is watering flowers in the garden. （对画线部分提问）

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10. David and Mike are going to planting trees this afternoon.（对画线部分提问）

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