智课网 | 出国考试武侠联盟 拓拂派《托福北冥神功》系列秘笈 出 国 考 试 托 武 福 侠 综 合 联 写 盟 作 TPO5 系 列 秘 范 笈 文 赏 析 智课网 | 出国考试武侠联盟 拓拂派《托福北冥神功》系列秘笈 综合写作 5 Reading As early as the twelfth century ., the settlements of Chaco Canyon in New Mexico in the American Southwest were notable for their "great houses," massive stone buildings that contain hundreds of rooms and often stand three or four stories high. Archaeologists have been trying to determine how the buildings were used. While there is still no universally agreed upon explan
