请教大全中遇到的几道有问题的题，谢谢！！

1.     The failing of the book lies not in a lack of attention to scientific detail but in the depiction of scenes of life and death in the marine world with emotional overtones that reduce the credibility of the work.  请教解释，为何时A而不是D

(A) the depiction of scenes of life and death in the marine world with emotional overtones that

(B) fact that it depicts marine world scenes of life and death as having emotional overtones that

(C) depiction of scenes of life and death in the marine world, whose emotional overtones

(D) depiction of marine world scenes of life and death, which have emotional overtones and thus（A）

(E) fact that if depicts scenes of life and death in the marine world, whose emotional overtones

2.     Those who have visited the Grand Canyon have typically seen layers of sediment in the gaping canyon, with different colors that mark the passage of time like the rings in a tree trunk.

这题的答案时D，请问怎么判断需要加入be able to呢？？

(A) seen layers of sediment in the gaping canyon, with different colors that mark

(B) see layers of sediment in the gaping canyon, whose different colors mark

(C) been seeing layers of sediment in the gaping canyon, whose different colors are markers of

(D) been able to see layers of sediment in the gaping canyon, with different colors marking（D）

(E) seen layers of sediment in the gaping canyon, marking by different colors

10.   There is ample evidence, derived from the lore of traditional folk medicine, that naturally occurring antibiotics are usually able to be modified to make them a more effective drug. 选E而不是B，请问遇到此类题，怎样才要判断需要修改原文中的用词呢？？

(A) are usually able to be modified to make them a more effective drug

(B) are usually able to be modified to make them more effective drugs

(C) are usually able to be modified, which makes them more effective drug

(D) can usually be modified to make them a more effective drug（E）

(E) can usually be modified to make them more effective drugs

11.   In repousse, a method of sculpture, workers lay copper sheets over wooden molds, and then, using a variety of exotic hammers, carefully pounding the metal into shape.  答案说时B,不过我觉得从动词对称来看肯定是D啊～

(A) In repousse, a method of sculpture, workers lay copper sheets over wooden molds, and then, using a variety of exotic hammers, carefully pounding the metal into shape.

(B) Repousse is method of sculpture in which workers lay copper sheets over wooden molds and then, using a variety of exotic hammers, carefully pound the metal into shape.

(C) Repousse workers, who do a method of sculpture by laying copper sheets over wooden molds, use a variety of exotic hammers, and then pounding the metal into shape.

(D) Workers who lay copper sheets over wooden molds use a variety of exotic hammers and carefully pound the metal into shape in order to do repousse, a method of sculpture.（B）

(E) Laying copper sheets over wooden molds, and using a variety of exotic hammers in order to pound the metal into shape, repousse is a method of sculpture done by workers.

12.   Lincoln, discovering in young manhood the secret that the Yankee peddler has learned before him, knew how to use a good story to generate good will.

请问此题为何选B而不是C？ 觉得应该用过去完成时呀

(A) Lincoln, discovering in young manhood the secret that the Yankee peddler has learned before him, knew

(B) Discovering in young manhood the secret that the Yankee peddler has learned before him, Lincoln knew

(C) Lincoln, discovering the secret that the Yankee peddler had learned in young manhood before him, knew

(D) In young manhood Lincoln discovered the secret that the Yankee peddler had learned before him;（B）

(E) Lincoln, discovered in young manhood the secret that the Yankee peddler had learned before him, knew

20.   uritan fanatics brought to civil and military affairs a coolness of judgment and mutability of purpose that some writers have though inconsistent with their religious zeal, but which was in fact a natural outgrowth of it.

请问选项中which修饰的难道不是coolness么？为何选C用复数？

(A) but which was in fact a natural outgrowth of it

(B) but which were in fact a natural outgrowth of it

(C) but which were in fact natural outgrowths of it

(D) but it was in fact a natural outgrowth of them（C）

(E) which was in fact a natural outgrowth of it

自己顶一个～～

盼解答！！