大全338 - 补充7 同位结构

7.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.

ETS说“Choice A is faulty because the pronoun it and the appositive a practice each lack a noun referent”....就是说a practice作为同位语前面没有可指代的名词.我想问的是,如果我理解成a practice指代前面的a single strain of plant is used for a given crop over a wide area这句话可以吗?

谢谢.

7.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.

ETS说“Choice A is faulty because the pronoun it and the appositive a practice each lack a noun referent”....就是说a practice作为同位语前面没有可指代的名词.我想问的是,如果我理解成a practice指代前面的a single strain of plant is used for a given crop over a wide area这句话可以吗?

谢谢.