怎么都想不明白的两道OG语法

kendra727

90.    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
(E) stationary crests and troughs although they are formed by rapidly moving air, is
答案是C，但是我实在不知道E为什么不对？

75.   Salt deposits and moisture threaten to destroy the Mohenjo-Daro excavation in Pakistan, the site of an ancient civilization that flourished at the same time as the civilizations in the Nile delta and the river valleys of the Tigris and Euphrates.

(A) that flourished at the same time as the civilizations

(B) that had flourished at the same time as had the civilizations

(C) that flourished at the same time those had

(D) flourishing at the same time as those did

(E) flourishing at the same time as those were


答案是A，A flourished at the same time as B..........，但是，难道不需要A flourished at the same time as B flourished 吗？A did at the same time as B did, 这样不是才对称吗？

[此贴子已经被作者于2008-7-22 16:02:20编辑过]

kendra727

顶一下，没人知道吗

kendra727

再自己顶，我还是没想明白，就没有人能告诉我一下吗

reallingling

以下是引用kendra727在2008-7-22 14:22:00的发言：
90.    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
(E) stationary crests and troughs although they are formed by rapidly moving air, is
答案是C，但是我实在不知道E为什么不对？

75.   Salt deposits and moisture threaten to destroy the Mohenjo-Daro excavation in Pakistan, the site of an ancient civilization that flourished at the same time as the civilizations in the Nile delta and the river valleys of the Tigris and Euphrates.

(A) that flourished at the same time as the civilizations

(B) that had flourished at the same time as had the civilizations

(C) that flourished at the same time those had

(D) flourishing at the same time as those did

(E) flourishing at the same time as those were


答案是A，A flourished at the same time as B..........，但是，难道不需要A flourished at the same time as B flourished 吗？A did at the same time as B did, 这样不是才对称吗？

90题

e中although状语从句加在一个短语“stationary crests and troughs"后面 awkward啊，og中有解释的；而c是宾语从句+although状语从句

75题  过去完成时用的不好呀，而且a也挺对称的，只是省略了动词did

lijiaxuan810823

remain，go,become,come四个词原文出现一定要保留，E没有保留remain因此错。

以上四个词表达了一种渐进的变化过程，因此必须保留，死背就好了。

xueyu815

kendra727你好，90题中的E中with
 stationary crests and troughs although they are formed by rapidly moving air是典型的状语从句修饰介词短语，这是错的，因为状语从句不能直接放在crests and troughs后面，而选项C就没事

75题中的比较对象为civilizations,比较结构中只有主语的比较才有助动词补充问题，而civilizations不是主语，不用补，这样除A外全错

batmanhm

90.既然用了although引导状语从句，就一定是修饰主句的，E的前面只是个形容词短语，缺少谓语构成完整的句子