单选题 The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.
These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.

单选题 While some military planners claimed that it would be possible to win a war fought with nuclear weapons, many scientists argued that such a war could not truly be won, because the fallout from nuclear warfare would create a nuclear winter and it also would be rendering the earth uninhabitable.
A. it also would be rendering the earth uninhabitable
B. rendering the earth uninhabitable
C. might have uninhabitably rendered the earth
D. render the earth uninhabitable
E. would also have rendered the earth uninhabitable

【正确答案】 D

【答案解析】The correct answer should provide a parallel construction to "create a nuclear winter," since both phrases follow "nuclear warfare would"; answer D is parallel to "create a nuclear winter," and it is the most succinct of the available choices.

单选题 Providing adequate public health-care facilities is a crucial task in a county like Travis, where more than 60 percent of household incomes are below the poverty line.
A. where more than 60 percent of household incomes are
B. where more than 60 percent of household income is
C. which has more than 60 percent of the household incomes
D. where they have more than 60 percent of household income
E. where more than 60 percent of them have household incomes

【正确答案】 A

【答案解析】Answer A is grammatically and stylistically correct.

单选题 Noted for its tenacity and courage, the English bulldog, having originally been bred for the brutal sport of bull-baiting, but now is cherished as a loyal animal companion.
A. the English bulldog, having originally been bred for the brutal sport of bull-baiting, but now is cherished
B. English bulldogs were originally bred for the brutal sport of bull-baiting, but they are now cherished
C. English bulldogs were originally bred to bait bulls in a brutal sport, but it is now cherished
D. the English bulldog was originally bred for the brutal sport of bull-baiting, but it is now cherished
E. the English bulldog, originally bred to bait bulls for a brutal sport, is now being cherished

【正确答案】 D

【答案解析】The answer has to refer to "the English bulldog" singular, because the final phrase refers to "a loyal animal companion" singular; therefore, B and C are out. Answer A is incorrect because the "but now" does not work with the phrasing of the sentence. Between D and E, the wording of E is somewhat awkward in that "is now being cherished" is less standard than the simpler "is now cherished;" D is the best answer.

单选题 Advanced market research for the MegaTek Corporation predicts that launching a MegaTek Superstore in a given city would only succeed should the density of repeat customers have been greater than 200 per square mile.
A. would only succeed should the density of repeat customers have been greater than
B. will succeed only should the density of repeat customers be more numerous than
C. will succeed only if the density of repeat customers is greater than
D. should only succeed with a repeat customer density of greater than
E. will succeed only with repeat customer density being greater than

【正确答案】 C

【答案解析】Since the underlined passage is what "the MegaTek Corporation predicts," the underlined passage should take the future tense "will" rather than "would" or "should." Of the choices B, C, and E, C presents the most standard English construction.