prep上的题， 答案是c, 但是此选项中两个it指代不同，望nn解释

Recent breakthroughs in technology have made it possible that high-definition digital video cameras are able to capture material with a degree of fidelity that nearly compares to 35-millimeter film and to project it digitally in theaters with no resulting loss of image quality.

(A) it possible that high-definition digital video cameras are able to capture material with a degree of fidelity that nearly compares to

(B) it possible to have high-definition digital video cameras that can capture material at a degree of fidelity almost like that with

(C) it possible for high-definition digital video cameras to capture material with a degree of fidelity nearly comparable to that of

(D) possible high-definition digital video cameras that can capture material at a degree of fidelity almost like

(E) possible high-definition digital video cameras able to capture material with a degree of fidelity that nearly compares to that with

顶顶顶

同问同问

而且第二个it还包含在第一个里面。。。

要么就是因为不在同一层。。。

118.       (30767-!-item-!-188;#058&004308)

It was only after Katharine Graham became publisher of The Washington Post in 1963 that it moved into the first rank of American newspapers, and it was under her command that the paper won high praise for its unrelenting reporting of the Watergate scandal.

(A) It was only after Katharine Graham became publisher of The Washington Post in 1963 that it moved into the first rank of American newspapers, and it was under her command that the paper won high praise

(B) It was only after Katharine Graham's becoming publisher of The Washington Post in 1963 that it moved into the first rank of American newspapers, and under her command it had won high praise

(C) Katharine Graham became publisher of The Washington Post in 1963, and only after that did it move into the first rank of American newspapers, having won high praise under her command

(D) Moving into the first rank of American newspapers only after Katharine Graham became its publisher in 1963, The Washington Post, winning high praise under her command

(E) Moving into the first rank of American newspapers only after Katharine Graham's becoming its publisher in 1963, The Washington Post won high praise under her command

此题答案是A, 这两个题说明it作形式主语时， 在同一个句子中是可以再指代其他的。gmat家规在it作形势主语或宾语时破例。 重大发现 

再看118题解释，知道我刚才理解错了， 请看118解释：

“强调结构，即“it+be动词+强调部分+who(m)或that+其他部分”。

强调结构中的it不作句子结构中的任何成分，无所指代，故认为不与后面有所指的it冲突。

但形式主语（也叫先行主语）不一样，形式主语it指代了句子的真正主语（真正的主语在句子后部），因为有所指，所以句子中如果再出现其它有所指的it，就冲突了。”

如果是这样，还请nn继续对102解释阿：为什么句子中it作形式宾语又能指代其他？

(A) it possible that high-definition digital video cameras are able to capture material with a degree of fidelity that nearly compares to

(B) it possible to have high-definition digital video cameras that can capture material at a degree of fidelity almost like that with

(C) it possible for high-definition digital video cameras to capture material with a degree of fidelity nearly comparable to that of

(D) possible high-definition digital video cameras that can capture material at a degree of fidelity almost like

(e) possible high-definition digital video cameras able to capture material with a degree of fidelity that nearly compares to that with

为什么是c?