求助 OG12-95 although的用法

Believer6

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

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


B crests and troughs that remail stationary although they are formed by rapidly moving air, are , are


C crests and troughs that remail 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


请问，根据曼哈顿：incorrect use of 'although' in the subordinate clause: 'although' has to separate a CLAUSE (with a verb) from another CLAUSE (with a verb). 'Stationary crests and troughs' doesn't have a verb. although是用来连接两个句子，所以E可以被排除，但是C选项中，although前面也不是带动词的句子啊？


那么，although在什么情况下可以不连接两个句子呢？

kiwifoodtown

that remain stationary 是个很完整的句子！

walt77

that remain stationary 是个很完整的句子！

-- by 会员 kiwifoodtown (2012/11/22 12:56:53)

呵呵~ 楼上说的对！
that 引导定语从句 指代 troughs 那么，
that remain stationary 是句完整的句子。

九尾

学到了！

Believer6

多谢