Final answer:
The correct conjunction to complete the sentence is 'pero'.
Step-by-step explanation:
The correct conjunction to complete the sentence is pero. The sentence would be: 'Eva: Juan, yo te ayudaré con tu tarea, pero me acompañas a la tintorería.' The word 'pero' means 'but' in English and is used to introduce a contrast or contradiction between two ideas or actions.
Learn more about Conjunctions in Spanish