og82

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.

(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（D）

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

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.

问题是这里为什么就不能是remained 和been平行呢？

small mills, ..., have been able to put capital into new technology and(have) remainedeconomically viable

it means E is grammatically correct but changes the original meaning?????????

please help me !!!!!!

Thanks!

如果是句意要讓have been和remained 平衡，那麼remained 不該省掉have

But please see og113

Visitors to the park have often looked up into the leafy canopy and saw monkeys sleeping on the branches, whose arms and legs hang like socks on a clothesline.

(A) saw monkeys sleeping on the branches, whose arms and legs hang

(B) saw monkeys sleeping on the branches, whose arms and legs were hanging

(C) saw monkeys sleeping on the branches, with arms and legs hanging

(D) seen monkeys sleeping on the branches, with arms and legs hanging（D）

(E) seen monkeys sleeping on the branches, whose arms and legs have hung

it seems omit "have" before "seen"

so I am confused!!

please tell whether "hvev" can be omitted or not???????

3Q

刪不刪是看有沒有歧異的

the past tense of remain is "remained" and so is the perfect tense " reminded"

但see可不同

see, saw, and seen .....

這是我個人看法，也請大家參與討論

白勇书称,be动词不能跟实义动词并列.

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最近做到一些题好像打破了这个规则. 时间紧没法找出来看,XDJM们对这个规则要持保留态度,我考完有时间找找例子.

这句的时态明显不是过去时，我想用remained也不会有歧异。

问题应该在于原句A.