[求助]天山2，9，14

ztlbox

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.

(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

请问D为什么对，随意添加助动词，A不对吗？different colors that mark 和different colors marking的区别，这种区别可以看成是放弃选项的一个标准吗？

9.     Baker was perhaps not the most gifted soloist in the orchestra, but the conductor felt what was lacking in his technical skill was more than made up by the passion with which he played the music.

(A) what was lacking in his technical skill was more than made up by

(B) what he lacked in technical skill was more than made up by

(C) whatever was lacking in his technical skill was more than made up by

(D) whatever he lacked in technical skill was more than made up for by（B）

(E) whatever he lacked in technical skill he more than made up by

more than made up 与前面的what引导的从句比较，省略什么东西了吗？

这个选项看上去很别扭，请大侠给解释一下好吗？

14.   A discussion of our nation’s foreign policy must begin with the fact of there being an independent Western Europe which now thinks of itself in trans-nationalist terms.

(A) A discussion of our nation’s foreign policy must begin with the fact of there being

(B) Beginning any discussion of our nation’s foreign policy must be the fact of there being

(C) Any discussion of our nation’s foreign policy must begin with the fact that there is

(D) Any discussion of our nation’s foreign policy must begin by acknowledging the existence of（D）

(E) To begin discussing our nation’s foreign policy thee must be an acknowledgment of the fact that

C为什么不对，D，我觉得说得很罗索，它正确的道理在哪里呢？

多帮忙啊

rt316

2-D is wrong and A is right.

9-what he lacked in technical skill was more than made up by = the thing that he lacked in technical skill was more than the thing made up by

14-logically, D is better than C. This is a some difficult quesion, I think.