一道og上的题，求解答

Claire951120

According to its proponents, a proposed new style of aircraft could, by skimming along the top of the atmosphere, fly between most points on Earth in under two hours.
A
According to its proponents, a proposed new style of aircraft could, by skimming along the top of the atmosphere, fly between most points on Earth in under two hours.
B
By skimming along the top of the atmosphere, proponents of a proposed new style of aircraft say it could fly between most points on Earth in under two hours.
C
A proposed new style of aircraft could fly between most points on Earth in under two hours, according to its proponents, with it skimming along the top of the atmosphere.
D
A proposed new style of aircraft, say its proponents, could fly between most points on Earth in under two hours because of its skimming along the top of the atmosphere.
E
According to its proponents, skimming along the top of the atmosphere makes it possible that a proposed new style of aircraft could fly between most points on Earth in under two hours.
选项A里面的its不需要先行词吗？为什么答案是A？

MarksJingXu

its是代词，指代 a proposed new style‘s。代词优于主句出现，如代词单复数与主句主语一致，则必然指代主句主语

Claire951120

哦哦，感谢楼上的回答～

emmahiggins09

当然是可以的啦，OG里面有好多先行词出现在主句之前的句子例子哦，比如下面这句来自OG16 - 49 题。这里his 就先出现了，指代后面 chief excutive.

Outlining his strategy for nursing the troubled conglomerate back to health, the
chief executive’s plans were announced on Wednesday for cutting the company’s huge debt by selling nearly $12 billion in assets over the next 18 months.

(A) executive’s plans were announced on Wednesday for cutting the company’s huge debt by selling nearly $12 billion in assets over the next 18 months

(B) executive’s plans, which are to cut the company’s huge debt by selling nearly $12 billion in assets over the next 18 months, were announced on Wednesday

(C) executive’s plans for cutting the company’s huge debt by selling nearly $12 billion in assets over the next 18 months were announced on Wednesday

(D) executive announced plans Wednesday to cut the company’s huge debt by selling nearly $12 billion in assets over the next 18 months

(E) executive announced plans Wednesday that are to cut the company’s huge debt by selling nearly $12 billion in assets over the next 18 months

楼主可以自己总结下OG里的这种现象，会发现有好多都是这样的。
楼主加油