【求助】OG12 106 112 126 , 代词指代？ ---------续问

林水监

OG12-112
As a baby emerges from the darkness of the womb with a rudimentary sense of vision, it would be rated about 20/500, or legally blind if it were an adult with
such vision.
(A) As a baby emerges from the darkness of the womb with a rudimentary sense of vision, it would be rated about 20/500, or legally blind if
it were an adult with such vision.
(B) A baby emerges from the darkness of the womb with a rudimentary sense of vision that would be rated about 20/500, or legally blind as an adult.
(C) As a baby emerges from the darkness of the womb, its rudimentary sense of vision would be rated about 20/500; qualifying it to be legally
blind if an adult.
(D) A baby emerges from the darkness of the womb with a rudimentary sense of vision that would be rated about 20/500; an adult with such vision
would be deemed legally blind.
(E) As a baby emerges from the darkness of the womb, its rudimentary sense of vision, which would deemed legally blind for an adult, would
be rated about 20/500.
OG,: it begins with a subordinate clause , whose subject is a baby; the subject of the main clause, it appears to refer back to baby.
Q1:“the subject of the main clause, it appears to refer back to baby.”这句话是根据什么判断的呢？“主句主语优先指代从句主语”或是“对称”[说不出来，就是觉得it 非指代a baby不可]

-- by 会员 kingarthur00 (2011/4/14 9:11:51)

It 这里用来指代baby，是不是因为it是主句主语，指代只能指代从句的主语，不能指代从句的状语成分中的名词~~额(⊙o⊙)…也就是说指代with a rudimentary sense of vision~~~求NN指正啊~~ (@﹏@)~

-- by 会员 mongmong (2011/5/23 13:45:02)

-- by 会员 kingarthur00 (2011/5/25 20:46:21)