Camparison of two problem OG 205 and GWD5-17

Today’s technology allows manufacturers to make small cars more fuel-efficient now than at any time in their production history.

small cars more fuel-efficient now than at any time in their

small cars that are more fuel-efficient than they were at any time in their

small cars that are more fuel-efficient than those at any other time in

more fuel-efficient small cars than those at any other time in their

more fuel-efficient small cars now than at any time in

205. The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, are known as “standing waves.”

(A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are

(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is

(D) stationary crests and troughs although the air that forms them is moving rapidly, are（C）

(E) stationary crests and troughs although they are formed by rapidly moving air, is

请问大家， 这里OG 205 是不是也可以解释为：stationary 前置不知道是修饰谁的原因呢？

  或者只是因为although clause 的原因？

谢谢！

问题不太清楚。

不过，我猜测，你是在问D、E两个答案的问题吧。

我认为不是因为“stationary 前置不知道是修饰谁的原因”，而是“因为although clause 的原因”，造成了D、E的错误。

Choice E uses the correct verb form, is, but it incorrectly introduces a dependent adverbial although clause into a prepositional phrase (with crests ...). Choice D also makes this error.

我对于OG205题E错的解释中的一部分不明白，

Such dependent clauses can only occur in the predicates of full clauses.

这是什么意思哪？

楼主的问题我也一直在困惑中,关于这个形容词的修饰范围问题,究竟这道题是不是属于修饰不清?同时贴出og的前面一题,如果这个不是修饰问题,那这个又怎么解释?!谢谢大家了!

112. Domestic automobile manufacturers have invested millions of dollars into research to develop cars more gasoline-efficient even than presently on the road.

(A)  into research to develop cars more gasoline-efficient even than presently on the road

(B)   into research for developing even more gasoline-efficient cars on the road than at present

(C)  for research for cars to be developed that are more gasoline-efficient even than presently the road

(D)  in research to develop cars even more gasoline-efficient than those at present on the road

(E)   in research for developing cars that are even more gasoline-efficient than presently on the road

Choice D, the best answer, uses the preposition than to compare two clearly specified and grammatically parallel terms, the cars the manufacturers hope to develop and those at present on the road. In A, the phrase more gasoline-efficient ... than presently on the road does not identify the second term of the comparison. In B, the misuse of modifying phrases produces an ambiguous and awkward statement: even more gasoline-efficient cars could refer either to more cars that are efficient or to cars that are more efficient. Choices B, C, and E all use research for [verb] where the idiom requires research to [verb]. In addition, C awkwardly separates even from more, and C and E again fail to indicate the second term of the comparison.

这个我也有问题。

那选项(C)也有个单独的although clause，和(E)的although clause的作用有什么不一样呢？

大家帮帮忙！

help！

同问。

1、

(D) stationary crests and troughs although the air that forms them is moving rapidly, are（C） stationary修饰谁？从语法上是两个都修饰吗？还是只有crests？

2、

C crests and troughs that remain stationary although the air that forms them is moving rapidly, is

这个定语从句修饰的又是谁？？

谢

although 是连词，不是介词。它可以连接句子，但是不能连接名词和句子.