按要求完成句子。
1. vacation/ Mike/ back/ to/ Canada/ went/ for/ summer (.) (练词成句)
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2.summer/ Yangyang/ in/ Beijing/ stayed/ for/ the (.) (练词成句)
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3. They went swimming yesterday. (改为否定句)
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4. We bought some juice yesterday. (对划线部分提问)
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5. I am going to visit Beijing next Sunday. (改为一般疑问句)
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