问题描述：
sat语法问题,是个挑错题,顺便求翻译
（To stand in） Persepolis in modern Iran and look out as Darius the First（ must have done）, at the immense （sweep of fields and mountains ）is （to grasp） the vastness of the ancient Persian Empire
答案貌似是选E,如有答案请解释,thx.
（To stand in） Persepolis in modern Iran and look out as Darius the First（ must have done）, at the immense （sweep of fields and mountains ）is （to grasp） the vastness of the ancient Persian Empire
答案貌似是选E,如有答案请解释,thx.
问题解答：
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