按要求改写句子。
1.We left Beijing on July 1. (对划线部分提问)
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2.Wu Yifan went to Zhejiang on his holiday. (对划线部分提问)
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3.I ate fresh food last Saturday. (改为否定句)
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4.I study, play and learn a lot. (改为一般过去时)
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5.Did Peter take any photos in China? (作肯定回答)
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