[Grammar] Nobel invented a new explosive, dynamite ___ the peacetime industries of mining and r

[tahasozgen]

Nobel invented a new explosive, dynamite ___ the peacetime industries of mining and road building, but saw it __ as a weapon of war to kill and injure his fellow men.


A) improving / to use
B) to be improved / being used
C) to have improved / using
D) being improved / to be used
E) to improve / used


My answer is B. Key depicts E.
This question appears at the "Gerunds & Infinitives" section. There are many subsections there. In which rule applies there? Thanks in advance.

 

[bhaisahab]

'Nobel invented a new explosive, dynamite, to be improved the peacetime industries...' makes no sense. E) is the only option that works for both gaps.

 

[teechar]

Simplifying the sentence, we get:

Nobel invented dynamite to improve mining and road building.

or

Nobel invented dynamite to be improved mining and road building.

Can you see why only the first is possible?

 

[emsr2d2]

If there is no comma after "dynamite" in the original, then there's an error.

 

[GoesStation]

Ask Which rule applies there? Beginning this question with a preposition is wrong.