请教：关于while doing

gzpg

408. In the last few years, the number of convictedcriminals given community service sentences, which allow the criminals toremain unconfined while they perform specific jobs benefiting the public, haverisen dramatically.
(A) sentences, which allow the criminals to remainunconfined while they perform specific jobs benefiting the public, have
(B) sentences, performing specific jobs that benefit thepublic while being allowed to remain unconfined, have
(C) sentences, performing specific jobs beneficial to thepublic while they are allowed to remain unconfined, have
(D) sentences which allow them to remain unconfined in theirperforming of specific jobs beneficial to the public has（E）
(E) sentences allowing them to remain unconfined whileperforming specific jobs that benefit the public has

while doing 是while sb. is doing的省略，当sb.的逻辑主语是主句主语时要省略。
问题是：while doing可以夹在allow sb. to do sth 里面吗？即是A allow B to do sth while (B is) doing sth?
恳请指点。

gzpg

谁能解惑？谢谢啦。

MaverickIris

指的就是A allow B to do sth while (B is) doing sth，while部分对to do进行补充说明，两者同时进行，
关系平等，都是allow的具体内容

gzpg

哦，感谢回复。
但是while doing的逻辑主语就不会是A吗？不会混淆吗？？？

还有一个问题就是：如果while doing是句子省略的话，那么就视为时间状语从句；A allow B to do sth while (B is) doing sth，to do 介词短语作为宾补修饰B，while doing 作为时间从句修饰介短的do动作， 问题就来了，不是说从句不能跟介词短语吗？？？！！（大全802为证）

802.       The peaks of a mountain range, acting likerocks in a streambed, produce ripples in the air flowing over them: theresulting flow pattern, with crests and troughs that remain stationaryalthough the air that forms them is moving rapidly, are known as “standingwaves.”
(A) crests and troughs that remain stationaryalthough the air that forms them is moving rapidly, are
(B) crests and troughs that remain stationaryalthough they are formed by rapidly moving air, are
(C) crests and troughs that remain stationaryalthough the air that forms them is moving rapidly, is
(D) stationary crests and troughs although heair that forms them is moving rapidly, are （C）
(E) stationary crests and troughs although theyare formed by rapidly moving air, is

gzpg

help,,

gzpg

求助。。哪位能帮助解答？谢谢啦。。

thechooosenone

同问，upup

清绿地

the number of ... has risen

ABC are out because of Have

between D and E.

D. awkward and comma is missing before which, and in their perfroming of ... is incorrect usage.

E is neater.