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 airthat 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：C
我选的E
解释是： The use of the active voice in the verbs of the subordinate clauses provides greater clarity of meaning.
但我认为E更简洁，求指教~作者: xiaomakunkun 时间: 2012-2-12 20:07
个人觉得E主要改变句子意思，原句说although air怎么怎么样，而E说although carests and troughs是怎样形成的，另外E还是用了被动，更把原句的remain这样有含义的系动词扔了不好作者: Sunfisher006 时间: 2012-2-13 06:40
plus,
they 指代不明作者: chaseconsult 时间: 2012-3-14 09:43
with the crests and troughs that remains stationary although the air that form them is moving rapidly." 是独立主格结构做插入语 with+n.+名词的修饰语，其中 that remains stationary although the air that form them is moving rapidly是the crests and troughs 的修饰语。
E选项中修饰语with the stationary crests and troughs although they are formed by rapidly moving air不正确的独立主格结构， although they are formed by rapidly moving air没有办法修饰crests and troughs
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