Final answer:
The sentence 'El ladrón llevaba una camiseta blanca' uses the Imperfect tense in Spanish.
Step-by-step explanation:
The correct answer is El ladrón llevaba una camiseta blanca. This sentence uses the Imperfect tense in Spanish. The Imperfect tense is used to talk about ongoing or repetitive actions in the past, or to describe characteristics, emotions, or states of being in the past. In this sentence, the verb 'llevaba' indicates an ongoing action in the past, describing what the thief was wearing (wearing a white shirt).
Learn more about Imperfect tense in Spanish