GRE Sentence Completion
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Sentence Completion Questions
1) Many medical experts believe that the origin of Attention Deficit Disorder (ADD) is _____, while others believe it is ______.
(A) contiguous -- environmental
(B) congenital --- environmental
(C) congenital -- deleterious
(D) contagious -- pathological
(E) exogenous -- celestial
Answer: Choice B is correct. We know from the context of the sentence that we are seeking opposite words relating to the origin of a diease.
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