Final answer:
The correct phrase to fill in the blank in the imperfect tense is 'acampabas'.
Step-by-step explanation:
The correct phrase to fill in the blank in the imperfect tense is acampabas. The clue provided, 'To camp', indicates that the verb is 'acampar', which means 'to camp'. In the imperfect tense, 'acampabas' is the correct form for the pronoun 'tú', meaning 'you'.
Learn more about imperfect tense in Spanish