OG 82题 谢谢

    82. In contrast to large steel plants that take iron ore through all the steps needed to produce several different kinds of steel, processing steel scrap into a specialized group of products has enabled small mills to put capital into new technology and remain economically viable.fficeffice" />

(A)         processing steel scrap into a specialized group of products has enabled small mills to put capital into new technology and remain

(B)             processing steel scrap into a specialized group of products has enabled small mills to put capital into new technology, remaining

(C)             the processing of steel scrap into a specialized group of products has enabled small mills to put capital into new technology, remaining

(D)         small mills, by processing steel scrap into a specialized group of products, have been able to put capital into new technology and remain

(E)             small mills, by processing steel scrap into a specialized group of products, have been able to put capital into new technology and remained

红笔标出的揭示部分没看懂，并且正确选项中的 remain 适合什么平行的呢？

The logical comparison here is between large steel plants and small mills. Choices A, B, and C illogically contrast large steel plants with [the] processing [of] steel scrap. Further, in choices B and C remaining is not parallel with put; conse­quently, it is not clear exactly what is remaining economically viable. The contrast between large plants and small mills is logically phrased in choices D and E, but remained in E is not parallel with put. Choice D, the best answer, uses parallel verb forms to complete the construction have been able to put... and remain.

逻辑上好像E也没什么不对，小厂能把资金投到新技术上并且保持经济上可维持着。

请专家解释，谢谢

象ca3ltoys这种理解，我想与现在完成时向对应的，也应该是一般现在时吧。仅凭对语法的一点印象提出这一看法，请指正。

我想问的是remaining的用法为什么不正确？因为分词放在句末，remaining表示前面的一种状态。请指教，谢谢

回mmfoolish:

所以remaining修飾processing steel scrap into a specialized group of products 這個動作囉?

這樣子邏輯上很奇怪..