GRE Exam Verbal Ability Sentence Completion

Question
There is nothing that (i)…………. scientists more than having an old problem in their field solved by someone from outside. If you doubt this (ii)………….. , just think about the (iii)…………….. reaction of paleontologists to the hypothesis of Luis Alvarez—a physicist—and Walter Alvarez—a geologist—that the extinction of the dinosaurs was caused by the impact of a large meteor on the surface of the planet.
Blank (i)
(A) amazes
(B) pleases
(C) nettles
Blank (ii)
(D) exposition
(E) objurgation
(F) observation
Blank (iii)
(G )contemptuous
(H) indifferent
(I) insincere

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GRE Other Question

Question
If one could don magic spectacles—with lenses that make the murky depths of the ocean become transparent—and look back several centuries to an age before widespread abuse of the oceans began, even the most (i)…………… observer would quickly discover that fish were formerly much more abundant. Likewise, many now-depleted species of marine mammals would appear (ii)………. . But without such special glasses, the differences between past and present oceans are indeed hard to (iii)……….. .
Blank (i)
(A) casual
(B) prescient
(C) clearheaded
Blank (ii)
(D) threatened
(E) plentiful
(F) unfamiliar
Blank (iii)
(G) ignore
(H) discern
(I) dismiss Question
Although he has long had a reputation for (i)………. , his behavior toward his coworkers has always been (ii)………….. , suggesting he may not be as insolent as people generally think.
Blank (i)
(A) inscrutability
(B) venality
(C) impudence
Blank (ii)
(D) brazen
(E) courteous
(F) predictable