请指教，觉得OG矛盾的一个地方：Although是不是不能引导不完整的句子呢？

OG11-9

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

正确：A

OG对although的解释：

Although typically introduces a suborinate clause, which has a subject and a verb, but here there is no subject.

然后我记住了，although要引导一个完整的句子（有谓語）

但是看到另一题又非常疑惑：

OG11紫皮18

With only 5 percent of the world's population, United States citizens consume 28 percent of its nonrenewable resources, drive more than one-third of its automobiles, and use 21 times more water per capita than Europeans do. (A) With (B) As (C) Being (D) Despite having (E) Although accounting for

这里答案为什么选although accounting for呢？

谢谢！

我这样解释不知道对不对

although的确要引导一个句子，但是在这里，第一句话的主语是US citizens，谓语是accounting for

通过语意更能得出转折关系，其他答案不能表示

尽管美国人占了全世界人口的5%，美国人却消耗28%的资源

UP

LZ  我自己想了想， although从句中，满足两个条件可以省略 1 是与主句主语一致 2 从句谓语动词是be动词  满足这两个条件可以省略主语和谓语动词

那么看看你列的两道题

(C) appear on the surface of the Sun as darkspots although never sighted at     这里少了have never been

E) Although accounting for    省略了 United States citizens are

再举个OG 158的例子， 希望能帮助理解。我也不知道自己想的这些对不对，希望牛人尽快现身  呵呵

95. Along with the drop in producer prices announced yesterday, the strong retail sales figures released today seem like it is indicative that the economy, although growing slowly, is not nearing a recession.

(A)  like it is indicative that

(B)   as if to indicate

(C)  to indicate that

(D)  indicative of

(E)   like an indication of

thanks so much!

今天做prep，有一道题

28. (26003-!-item-!-188;#058&002229)

Polio, although it is eradicated in the United States, it continues elsewhere and is able to be

brought into the country by visitors.

(A) Polio, although it is eradicated in the United States, it continues elsewhere and is able to be

(B) Polio, although eradicated in the United States, it still continues elsewhere and can be

(C) Although still continuing elsewhere, polio has been eradicated in the United States and

could be

(D) Although having been eradicated in the United States, polio still continues elsewhere and is

capable of being

(E) Although eradicated in the United States, polio continues elsewhere and could be 

选项是E

也确实E是最简洁结构最好的

所以虽然OG说

Although typically introduces a suborinate clause, which has a subject and a verb

在考试时不能只凭一个“规则”就Foul掉那个选项。

现在越做越有这种感觉，就算OG在一题的解释里说某某用法awkward，但在GWD或者PREP里面，就不能以这个作标志去否定一个选项，唉，越来越难了。

谢谢楼上的，所以要抛开所有的“规则”

语意为王。

语意语意语意。