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08 Dec 2019, 10:20
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
67% (00:53) correct
33%
(01:20)
wrong
based on 138
sessions
History
Date
Time
Result
Not Attempted Yet
Astronomical distances are so vast, compared to those that we are accustomed to, that by the time an astronomical event has been observed, centuries had already been elapsed since the actual event.
(A) has been observed, centuries had already been
(B) has been observed, centuries had already
(C) is observed, centuries were already
(D) is observed, centuries have already
(E) was observed, centuries had already been
(A) has been observed, centuries had already been
(B) has been observed, centuries had already
(C) is observed, centuries were already
(D) is observed, centuries have already
(E) was observed, centuries had already been
08 Dec 2019, 10:41
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DealMakerOne
CLean (D)....
By the time X is ________ Y has already happened...
