GWD-6-Q2:

sorcerer

GWD-6-Q2:
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.

1. 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.
   
   
2. 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.
   
   
3. 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.
   
   
4. 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.
   
   
5. 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.
   排除BCDE选了A，但回头想想by skimming会不会产生修饰could，或fly的歧义呢？
   请NN解答
   

sorcerer

UP

sorcerer

up

aeoluseros

只有核心动词才会被副词短语(状语)修饰，助动词/情态动词不会，所以by...仅修饰fly。

sorcerer

终于盼到您啦~~~呵呵，懂了！！THX