OG 12 SC 14和98 关于although后跟句子的问题

hannah烂番茄

9.             Sunspots, vortices of gas associated with strong electromagnetic activity, are visible as dark spots on surface of the Sun but have never been sighted on the Sun's poles or equator.
(A)         are visible as dark spots on the surface of the Sun but have never been sighted on
(B)         are visible as dark spots that never have been sighted on the surface of the Sun
(C)         appear on the surface of the Sun as darkspots although never sighted at
(D)        appear as dark spots on the surface of the Sun, although never having been sighted at
(E)         appear as dark spots on the Sun's surface, which have never been sighted on

选A，OG 说C错在， although typically introduces a subordinate clause,which has a subject and a verb.

但是 OG 12 SC 98

98、Even though Clovis points, spear points with longitudinal grooves chipped onto their faces, have been found all over north America, they are named for the New Mexico site where they were first discovered in 1932.

A.         Even though Clovis points, spear points with longitudinal grooves chipped onto their faces, have been found all over north America, they are named for the New Mexico site where they were first discovered in 1932.

B.         Although named for the New Mexico site where first discovered in 1932, Clovis points are spear points of longitudinal grooves chipped onto their faces and have been found all over north America .

C.         Named for the New Mexico site where they have been first discovered in 1932, Clovis points, spear points of longitudinal grooves chipped onto the faces, have been found all over north America .

D.         Spear points with longitudinal grooves that are chipped onto the faces ,Clovis points , even though named for the New Mexico site where first discovered in 1932, but were found all over north America .

E.         While Clovis points are spear points whose faces have longitudinal grooves chipped into them, they have been found all over north America, and named for the New Mexico site where they have been first discovered in 1932

选A,

B与D虽然可以通过其他原因排除

但是even though 与although并没有连接完整的句子呀，但是OG解释并没有说这两点错了。。。

WHY???是省略了还是怎么滴？even though, although 是否必须跟完整的句子呀？！

求NN 解释！

hannah烂番茄

谢谢楼上！清楚明了

backli00

嗯 我也有与楼主同样的疑问，prep2008 206. (GWD-21-Q29)也有解释，although可以省略：
为何OG有如此解释？？
1.状语从句的省略：

1）两点省略要求：

第一点是毫无疑问的：逻辑主语等于句子主语

第二点也是必须的：从句的谓语必需是be（没要求主句谓语也必需是be！换句话说状从的省略可以看成是省略了一个be），且从句主语和谓语要么同省，要么同留。

2）形式

(1)正确形式: 表示时间/条件/转折/让步的连词(when/while/if/unless/although/even though/even if) + 形容词短语/-ing短语/-ed短语

(逻辑主语等于句子主语)(所以when a child/ when children是错的； if + n.也是错的)

hannah烂番茄

但是98题的B：Although named for the New Mexico site  不是跟的完整的句子呀~这个算不算错呢！？
先谢谢罗！

eshopaholic

OG在上一题说了， although typically introduces a subordinate clause,which has a subject and a verb.  要跟完整的句子

eshopaholic

9题，(C)         appear on the surface of the Sun as darkspots although never sighted at

although 引导的从句不完整呀，没有主语；且根据句意也应该是be sighted