听白勇语法，两道不明白的题请教

The proposed urban development zones do not represent a new principle; it was employed in "Operation Bootstrap" in Puerto Rico.

(A) do not represent a new principle; it

(B) represent not a new principle, but one that

(C) are not a new principle; the same one

(D) are not a new principle, but one that

(E) are not new in principle; it

这里的it指代谁，白老师说，指代a new principle,不能指代principle，所以A的逻辑不对

B中的one指代principle

我就不明白，为什么说it必须指代一个名词短语，而one就指代名词，凭什么这么说？

A 读起来就感觉应该是优先指代zones. 当然不能用It代了。而且就是改成复数，逻辑也不同呀。

it 和one 在指代上最大的区别是：It 代原物。one 代原物的同类物。有本质区别。

The labor agreement permits staff reductions through attrition with increased pension benefits and a special early-retirement program for speeding it up.

(A) attrition with increased pension benefits and a special early-retirement program for speeding it up

(B) attrition and provides increased pension benefits and a special early-retirement program to speed the attrition process

(C) attrition, which will be speeded up by providing increased pension benefits and a special early-retirement program

(D) attrition, which, by their providing increased pension benefits and a special early-retirement

program, will speed the process

(E) attrition, which provides increased pension benefits and a special early-retirement program for speeding the attrition process

A中的it指代谁，老白认为是attrition，我不明白为什么，it前面还有program，为什么不说指代它，一定说it是指代attrition。

你要首先理解句子的意思才行。with increased pension benefits and a special early-retirement program for speeding    the program    up.     program speed itself up? illogical. 这里的问题根本不在于it 的指代上面。整个with 结构修饰什么就unclear, 而且for speeding it up表示目的也不对。应该用不定式。

另提问请加上画线，这个各位版主已多次强调。看的累死了。

我听的是网络课堂，没法提问，只能在这里求助，谢谢！