- Mi padre <u><em>leía</em></u> el periódico por las noches.
Explanation:
The translation of the sentence is:
- My father <u>read</u> the newspaper at night.
The verb <em>"leer"</em> conjugated in the Indicative Form of the Imperfect Preterite may have the following conjugation taking into account the personal pronoun:
Since the noun in the sentence is <em>"mi padre"</em> which could be replaced by the personal pronoun <em>"él"</em>, the correct conjugation of the verb in Imperfect Preterite is <u><em>"leía"</em></u>.