I'm really keen ___ going to the park with my daughter.

I'm really keen ___ going to the park with my daughter.

• A. on
• B. to
• C. for
• D. in

Answer: (A)

The main idea is the verb-preposition pattern after keen. When you’re expressing enthusiasm about something, you use the fixed phrase keen on, which is followed by a verb in the -ing form. Here, the action is going, so the natural fit is keen on going. The other prepositions don’t line up with this common pattern (for example, keen to would typically pair with the infinitive form, like keen to go, rather than the -ing form). So the sentence reads naturally as: I’m really keen on going to the park with my daughter.

The main idea is the verb-preposition pattern after keen. When you’re expressing enthusiasm about something, you use the fixed phrase keen on, which is followed by a verb in the -ing form. Here, the action is going, so the natural fit is keen on going. The other prepositions don’t line up with this common pattern (for example, keen to would typically pair with the infinitive form, like keen to go, rather than the -ing form). So the sentence reads naturally as: I’m really keen on going to the park with my daughter.