Thus far, predictions that global ____________ would lead to mass starvation have proven false; however, in the years to come, population ____________ may yet prove to be one of the world's greatest problems.
- pollution . . expansion
- overcrowding . . growth
- poverty . . density
- deforestation . . control
- warfare . . stabilization
Answer(s): B
Explanation:
The word "however" tells you that the two halves of the sentence contrast with one another. The first half says that "predictions" of "mass starvation have proven false"; the second half says that, in the future, (something) "may yet prove to be one of the world's greatest problems." Thus, the contrast involves the idea that a problem which doesn't exist now may come to exist in the future; the same problem is being discussed in the both parts of the sentence. Choice (B), then, makes sense because "global overcrowding" and "population growth" describe the same problem.
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