Quasars are so distant that their light has taken billions of years to reach the Earth; consequently, we see them as they were during the formation of the universe.
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Awe see them as they were during
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Bwe see them as they had been during
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Cwe see them as if during
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Dthey appear to us as they did in
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Ethey appear to us as though in
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显示答案
正确答案: A