sorry贴图不成,再来! The Anasazi settlements at Chaco Canyon were built on a spectacular scale with more than 75 carefully engineered structures, of up to 600 rooms each,were connected by a complex regional system of roads. A.with more than 75 carefully engineered structures, of up to 600 rooms each,were B.with more than 75 carefully engineered structures, of up to 600 rooms each, C.of more than 75 carefully engineered structures of up to 600 rooms ,each that had been D.of more than 75 carefully engineered structures of up to 600 rooms and with each E.of more than 75 carefully engineered structures of up to 600 rooms each had been |