按要求完成句子。
15. We will go to the zoo tomorrow. (对划线部分提问)
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16. I will fly a kite.(改为否定句)
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17. I like snow.(改为否定句)
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18. I will run home. I will close the door.(合并成一句话)
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19. go, will, trip, tomorrow, we, on, a(.)(连词成句)
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