求助OG 里面的几道题目，求大家帮忙，真是百思不得其解，在线等

The gyrfalcon, an Arctic bird of prey, has survived a close brush with extinction; its numbers are now five times greater than when the use of DDT was sharply restricted in the early 1970’s.　　(A) extinction; its numbers are now five times greater than
　　(B) extinction; its numbers are now five times more than
　　(C) extinction, their numbers now fivefold what they were
　　(D) extinction, now with fivefold the numbers they had
　　(E) extinction, now with numbers five times greater than


看了论坛的帖子，http://forum.chasedream.com/GMAT_SC/thread-80567-1-1.html说的是with的用法，可是这题我没办法解释。因为OG答案解释D是说：The comma introdouces a confusing phrase seeming to modify extinction.如果按照帖子所说，那with应该修饰宾语brush。为什么会说修饰extinction......求赐教

首先，LZ对于独立主格的理解有偏差，独立主格不是同位语，不是对名词的修饰语，独立主格米有具体的修饰对象，只是对于前面整个动作的的修饰，在这里DE错误的原因，是由于with前面的now（副词）没有对应的修饰对象V，但with独立主格本身是没有问题的。
另外，关于这个帖子：不知道是不是我没理解好，第三点和第四点没有区别啊，为什么一个修饰主语，一个修饰宾语
引用：
3）主语与with有逗号隔开，形式有“with短语，主句”和“主句，with”，with短语修饰主句中的主语，with表示“有”的意思，例如，og19，og158。

4）主语+谓语+宾语，with短语。with短语修饰宾语，with表示“有”的意思，例如，og114。

我是个人理解啊，您看的这个帖子不是很好，说的很笼统，并没有分离出with独立主格和with介词短语的两种情况，刚看我也是不理解，还有那个作者就是可能是口误吧，状语怎么可能修饰主语呢？状语是不修饰名词的。。。。对于上面的3.4点，我重新给您说个理解吧，个人想法：
当with为独立主格时，“with独立主格，主句”——这时，with.....多做主句原因状语，“主句，with独立主格”——可作为主句的伴随状语，原因状语，并当主句为主系表时，with则表示对主句状态的额外说明或增添的额外信息。
当with就是作为with短语，那就是当做介宾短语考虑就行，简单记一下常考的，就是S,with短语，VO,和with短语，SVO----这两种with的位置不会引起歧义。

附加题：OG 73. The British Admiralty and the War Office met in March 1892 to consider a possible Russian attempt to seize Constantinople and how they would have to act militarily to deal with them.　　(A) how they would have to act militarily to deal with
(B) how to deal with them if military action would be necessary if
(C) what would be necessary militarily for dealing with such an event
(D) what military action would be necessary in order to deal with such an event
(E) the necessity of what kind of military action in order to take for dealing with it wordy,
对于B OG解释是it 无指代，是因为one的关系么？如果是这样的话，那为什么D和E也会说无指代呢？不是完全可以指出是condition么？求帮助，好困扰我啊！！！

这个题你到你想问什么啊“？？？？B哪里来的it？？？？？

　The computer company's present troubles are a result of technological stagnation, markteing missteps, and mangerial blunders so that several attempts to revise corporate strategies have failed to coorect it.
A so that several attempts to revise corporate strategies have failed to coorect it.
B so that several attempt at revising corporate strategies have failed to correct
C in that several attempts at revising corporate strategies have failed to correct them
D that several attempts to revise corporate strategies have failed to correct
E that several attempts at revising corporate strategies have failed to correct them

这里如果A和B 的that去掉对么？　
LZ去掉that能说明什么呢？？？就根本不成句子了啊。。。so several attempts to????LZ是想说明什么呢。。。。。

85.According to a study by the Carnegie Foundation for the Advancement of Teaching, companies in the United States are providing job training and general education for nearly eight million people, about equivalent to the enrollment of the nation's four-year colleges and universities.

A.equivalent to the enrollment of
B.the equivalent of those enrolled in
C.equal to those who are enrolled in
D.as many as the enrollment of
E.as many as are enrolled in

E选项是省略了those who么？这种省略我遇到过好多次，感觉没有找到规律。谁能告诉我基本规律呢？

对的。。这里就是因为比较的主语相同，省略主语。。。
规律，一般情况吧，比较的两者主语相同，省略主语，位于相同省略谓语，甚至是主谓都省略。。。LZ还是多看看基础的语法知识点，别光做题，这都是会讲解的点。。。。


113.In AD 391,resulting from the destruction of the largest library of the ancient world at Alexandriea, later generations lost all but the IIiad and Odyssey among Greek epics, most of the poetry of Pindar and Sappho, and dozens of plays by Aeschylus and Euripides.
A
B.the destroying of the largest library of the ancient world at Alexandriea resulted and
C.because of the result of the destruction of the library at Alexandriea,the largest of ancient world
D.as a result of the destruction of the library at Alexandriea, the largest of the ancient world,
E.Alexandriea's largest library of the ancient world was destroyed, and the result was
答案是D，但是我认为C和D都有指代不明的地，像红色标记的地方，the largest 是修饰library的，但是跟在Alex后面不就是修饰Alex么，求各位赐教。