Final answer:
The appropriate imperfect verb to fill in the blank is 'me gustaba'. This indicates a past action and expresses the idea of not liking tomatoes in the past.
Step-by-step explanation:
The appropriate imperfect verb to fill in the blank in the sentence is me gustaba.
Cuando yo era pequeño, no me gustaba nada los tomates. (When I was little, I did not like tomatoes at all.)
The phrase 'me gustaba' indicates a past action and expresses the idea that the speaker did not like tomatoes in the past.
Learn more about Fill in the blank with the appropriate imperfect verb in Spanish