one og question

robliuyu

og Q180. Quasars are so distant that their light has taken billions of years to reach the Earth; Consequently, [[U]we see them as they were during [/U]]the formation of the universe.

A.  we see them as they were during

my comment: og says the key is A. But I do not understand the structure of the sentence.why do not use we saw them as they were...[em07]

tongxun

两个不同时期的动作。看，是现在看见的；形成，是以前形成的。