Question

She is keen ________ going aboard. Preposition

Answer 1

Hey mate....

$\huge\underline\mathfrak\pink{Answer}$

on

$\huge\underline\mathfrak\red{Thank\:You}$

Answer 2

She is keen on going abroad.

• The phrase 'keen on' refers to a state of the human mind where you are very enthusiastic or excited about the event.
• It refers to a state when a person looks forward to something with all of its energy.
• Thus, we use the preposition 'on' with keen in the given sentence as the sentence talks of an event a person is looking forward to.