La enfermedad que Antonio tuvo fue apendicitis
The correct answer is: [D]: "Eran" .
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Note: This is the only conjugated "verb tense" that makes sense.
Furthermore, it makes sense, since it is a form of the Spanish verb, "ser" .
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Answer:
1. mis 2.míos 3. tuyos 4. mía 5. tus 6. son
Explanation: