Answer: The correct answer is "Yo le di un lápiz a mi amigo".
Step-by-step explanation: The verb in the sentence provided that has been conjugated in the present tense is "doy". The preterite form of the verb "doy" is "di" because "dar" (the infinitive form of this verb) is irregular. In that way, as the preterite form of most irregular verbs in Spanish ends in "i", such as "vi", the form that fills in the answer blank is "di".