If a single strain of plant is used for a given crop over a wide area, a practice fostered by modern seed-marketing methods, it increases the likelihood that the impact of a single crop disease or pest will be disastrous.
(A) If a single strain of plant is used for a given crop over a wide area, a practice fostered by modern seed-marketing methods, it
(B) If a single strain of plant is used for a given crop over a wide area, as is fostered by modern seed-marketing methods, it
(C) A practice fostered by modern seed-marketing methods, a single strain of plant used for a given crop over a wide area
(D) A single strain of plant used for a given crop over a wide area, a practice fostered by modern seed-marketing methods,(E)
(E) The use of single strain of plant for a given crop over a wide area, a practice fostered by modern seed-marketing methods,
Choice A is faulty because the pronoun it and the appositive a practice each lack a noun referent. Nor are there logical referents in choice B for as is and it. Choice C entails a false appositive: the sentence now says that the single strain of plant is itself a practice fostered by modern seed-marketing methods, not that the use of a single strain is such a practice. Choice D reverses the order of the constructions, but the appositive remains illogical. Choice E is correct: use is the proper subject for the verb increases and a logical governing noun for the appositive practice. This question is of middle difficulty.
看了以前的讨论,说同位语可以用来修饰前面的整个句子,那么D为什么不对呢
还是同位语必须有一个相应的中心名词?
请NN指教 |