677. Sunspots, vortices of gas associated with strong electromagnetic activity, are visible as dark spots on the surface of the Sun but have never been sighted on the Suns poles or equator.
(A) are visible as dark spots on the surface of the Sun but have never been sighted on
(B) are visible as dark spots that never have been sighted on the surface of the Sun
(C) appear on the surface of the Sun as dark spots although never sighted at
(D) appear as dark spots on the surface of the Sun, although never having been sighted at
(E) appear as dark spots on the Suns surface, which have never been sighted on
Solution:
OG Solution: Logical predication + parallelism
The correct parallel structure in the original sentence emphasizes the contrast between where sunspots are found (are visible Sun) and where they are not (have never been sighted equator). Sunspots is the subject of the sentence, are is the verb of the first part of the contrast and have been sighted is the verb of the second. (The adjective visible is a complement and is parallel to the past participle sighted). Both parts of the sentence conclude with phrases indicating location. The contrast itself is indicated by the conjunction but.
(A) Correct. This sentence clearly and correctly draws a contrast between where sunspots are found and where they are not.
(B) Changing the modifying clause so that that never Sun distorts the meaning of the sentence; the contrast is lost.
(C) Although typically introduces a subordinate clause, which has a subject and a verb, but here there is no subject and sighted is not a complete verb
(D) Although usually introduces a subordinate clause, but there is no subject of the clause and having been sighted is not a complete verb phrase.
(E) The relative pronoun which should immediately follow its referent; here which illogically follows surface, and its intended referent, either sunspots or dark spots, becomes unclear
Sentence Correction - 1000 Questions with Solution:
(A) are visible as dark spots on the surface of the Sun but have never been sighted on
(B) are visible as dark spots that never have been sighted on the surface of the Sun
(C) appear on the surface of the Sun as dark spots although never sighted at
(D) appear as dark spots on the surface of the Sun, although never having been sighted at
(E) appear as dark spots on the Suns surface, which have never been sighted on
Solution:
OG Solution: Logical predication + parallelism
The correct parallel structure in the original sentence emphasizes the contrast between where sunspots are found (are visible Sun) and where they are not (have never been sighted equator). Sunspots is the subject of the sentence, are is the verb of the first part of the contrast and have been sighted is the verb of the second. (The adjective visible is a complement and is parallel to the past participle sighted). Both parts of the sentence conclude with phrases indicating location. The contrast itself is indicated by the conjunction but.
(A) Correct. This sentence clearly and correctly draws a contrast between where sunspots are found and where they are not.
(B) Changing the modifying clause so that that never Sun distorts the meaning of the sentence; the contrast is lost.
(C) Although typically introduces a subordinate clause, which has a subject and a verb, but here there is no subject and sighted is not a complete verb
(D) Although usually introduces a subordinate clause, but there is no subject of the clause and having been sighted is not a complete verb phrase.
(E) The relative pronoun which should immediately follow its referent; here which illogically follows surface, and its intended referent, either sunspots or dark spots, becomes unclear
Sentence Correction - 1000 Questions with Solution: