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 (E) stationary crests and troughs although they are formed by rapidly moving air, is
ETS said that
Choice E uses the correct verb form, is, but it incorrectly introduces a dependent
adverbial although clause into a prepositional phrase (with crests ...).
I still don't know what is the mistake
[此贴子已经被作者于2005-1-5 14:08:56编辑过] |