按要求写句子。
1. He likes running. (改为一般疑问句)
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2. We'll have a picnic at this weekend. (对画线部分提问)
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3. Do you have lunch at school? (作肯定回答)
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4. How much are these watermelons? (改为单数句)
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5. Beijing is in the east of China. (对画线部分提问)
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