Final answer:
This question is about rewriting sentences using preterite or imperfect tense in Spanish.
Step-by-step explanation:
The subject of this question is Spanish, and it is at a high school level. The question asks the student to rewrite the sentences using the appropriate tense of the indicated verbs, either preterite or imperfect. The provided examples demonstrate how to make the necessary changes to the sentences. For example, in the model sentence, 'Elena estudia todas las mañanas' is changed to 'Elena estudiaba todas las mañanas.'
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