求助：OG12-95

socat123

95. 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
我觉得E比起C来说更加简洁啊，答案说E会造成UNCLERA，？？？不懂。。。求解释啊

socat123

谢谢啊~

zhangmile

E中although前面是名词短语，不能跟

C中remain使得although可以跟
因为一般although+S1+V1, S2+V2.

although+S1+V1, N. 不对

LZ可以google一下这个题目，很多讨论帖，讲的很详细。关于这一考点。