In its most recent approach, the comet Crommelin passed the Earth at about the same distance and in about the same position, some 25 degrees above the horizon, that Halley’s comet will pass
the next time it appears.
(A) that Halley’s comet will pass
(B) that Halley’s comet is to be passing
(C) as Halley’s comet--> changes the meaning
(D) as will Halley’s comet
(E) as Halley’s comet will do--> use of "do" is incorrect here use "will" is sufficient for the implied comparison.
"That" is used without comma because the clause it introduces is essential one, hence A and B are wrong.
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