按要求完成下列句子。
1. It's May 1st. (对画线部分提问)
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2. It's in July. (改为一般疑问句)
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3. My birthday is on May 3rd.(对画线部分提问)
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4. You can eat it. (改为否定句)
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5. They think 13 is a good number.(改为否定句)
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