SC 2. a site once used as an observatory by the anasazi, ancient pueblo dwellers of new mexico, has been recently discovered where patterns of light and shadow were employed to establish the precise limits of the positions of the sun and moon over a nineteen-year cycle. A) a site once used as an observatory by the anasazi, ancient pueblo dwellers of new mexico, has been recently discovered where patterns of light and shadow were employed to establish the precise limits of the positions of the sun and moon over a nineteen-year cycle. B) a recently discovered site was once used as an observatory by the anasazi, ancient pueblo dwellers of new mexico, where patterns of light and shadow were employed to establish the precise limits of the positions of the sun and moon over a nineteen-year cycle. C) at a recently discovered site once used as an observatory by the anasazi, ancient pueblo dwellers of new mexico, patterns of light and shadow were employed to establish the precise limits of the positions of the sun and moon over a nineteen-year cycle. D) patterns of light and shadow were employed to establish the precise limits of the positions of the sun and moon over a nineteen-year cycle at a site that was recently discovered and was once used by the anasazi, ancient pueblo dwellers of new mexico. E) patterns of light and shadow were employed to establish the precise limits of the positions of the sun and moon over a nineteen-year cycle at a recently discovered place that the anasazi, ancient pueblo dwellers of new mexico,once used the site as an observatory. 答案是C 请问有人知道为什麽吗 还有为什麽会在awkwardness分类里 我看不太出来原因 --

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