2013
高考英语二轮（阅读理解）精品训练（08）及答案 （*********） robably you have seen photographs of the grand canyon (峡谷), the great valley in the desert country of arizona. but you must go there yourself to feel its true size and beauty. tie grand canyon is one of the greatest natural wonders of the world. the colorado river formed the grand canyon over mil lions of years. slowly, the river cut down through hard rock. at the same time. the land was rising. today. the canyon is one and a half kilometres deep and 445 kilometres long. the el dest rocks at
