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![缺词填空 速度、、、、、Before windows were used,old h in Europe(欧洲)and Britain were very dark.Their great rooms were high w only one hole in the roof(屋顶)to let the smoke o from cooking fire.Later,people began to make the ho](/uploads/image/z/11299344-24-4.jpg?t=%E7%BC%BA%E8%AF%8D%E5%A1%AB%E7%A9%BA+%E9%80%9F%E5%BA%A6%E3%80%81%E3%80%81%E3%80%81%E3%80%81%E3%80%81Before+windows+were+used%2Cold+h+in+Europe%EF%BC%88%E6%AC%A7%E6%B4%B2%EF%BC%89and+Britain+were+very+dark.Their+great+rooms+were+high+w+only+one+hole+in+the+roof%EF%BC%88%E5%B1%8B%E9%A1%B6%EF%BC%89to+let+the+smoke+o+from+cooking+fire.Later%2Cpeople+began+to+make+the+ho)
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